Successfully complete the indicated task to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", "My profile", "View all my games", then the game and view stats.
A Road Less Traveled: Completed the mission "The Road To Sanctuary".
Always Improving: Reached level 25.
An Angel's Wish: Completed the mission "Where Angels Fear To Tread".
An Old Flame: Completed the mission "Hunting The Firehawk".
Arctic Explorer: Discovered all named locations in Three Horns, Tundra Express, and Frostburn Canyon.
Better Than Money: Purchased 5 items from the black market.
Better Than You Were: Reached level 10.
Blight Explorer: Discovered all named locations in Eridium Blight, Arid Nexus, and Sawtooth Cauldron.
Bombs Away: Completed the mission "Toil And Trouble".
Bounty Hunter: Completed 20 side missions.
Build Buster: Killed a Constructor without it ever building another bot.
Can See My House From Here: Completed the mission "Bright Lights, Flying City".
Capped Out...For Now: Reached level 50.
Challenge Accepted: Completed level 1 of all non-level-specific challenges with a single character.
Cool Story, Bro: Defeated Jack.
Cute Loot: Killed a Chubby.
Decked Out: Had Purple-rated gear or better equipped in every slot.
Definitely An Italian Plumber: Killed Donkey Mong.
Did It All: Completed all side missions.
Dragon Slayer: Completed the mission "Best Minion Ever".
Farewell, Old Girl: Completed the mission "Wildlife Preservation".
Feels Like The First Time: Opened the chest at the bus stop in Fyrestone.
First One's Free: Completed the mission "My First Gun".
Friendship Rules: Revived someone from "Fight for Your Life!" that is on your friends list.
Goliath, Meet David: Allowed a Goliath to level up four times before killing him.
Got The Band Back Together: Completed the mission "The Once and Future Slab".
High-Flying Hurler: Killed a flying enemy with a thrown Tediore weapon.
Highlands Explorer: Discovered all named locations in The Highlands, Thousand Cuts, and Wildlife Exploitation Preserve.
How Do I Look?: Unlocked 10 customization items.
Identity Theft: Completed the mission "The Man Who Would Be Jack".
Knowing Is Half The Battle: Completed the mission "Data Mining".
New In Town: Completed the mission "Plan B".
No Man Left Behind: Completed the mission "A Dam Fine Rescue".
Not Quite Dead: Reached level 5.
Phased and Confused: Phaselocked 100 enemies.
Sabre Rattler: Killed 100 enemies with the Sabre turret.
Sky's The Limit: Completed the mission "Rising Action".
So Much Blood!: Gunzerked continuously for 90 seconds.
Sugar Daddy: Tipped Moxxi $10,000.
Thresher Thrashed: Defeated Terramorphous the Invincible.
Token Gesture: Redeemed 25 tokens.
Tribute To A Vault Hunter: Got an item from Michael Mamaril.
Unseen Predator: Remained in Zero's Deception mode for ten seconds straight.
Up High, Down Low: Gave Claptrap a high five.
Urban Explorer: Discovered all named locations in Sanctuary, Opportunity, and Lynchwood.
Well That Was Easy: Completed the mission "Shoot This Guy in the Face".
Went Five Rounds: Completed Round 5 of any Circle of Slaughter.
What does it mean?: I can't even capture it on my camera.
Wilhelm Screamed: Completed the mission "A Train To Catch".
World Traveler: Discovered all named locations.
The following achievements require the "Captain Scarlett And Her Pirate's Booty" bonus downloadable content:
Treasure Hunter: Complete the mission "X Marks the Spot".
Gadabout: Discover all named locations in Oasis and the surrounding Pirate's Booty zones.
Completionist: Complete all Pirate's Booty side missions.
The following achievements require the "Mr. Torgue's Campaign Of Carnage" bonus downloadable content:
Explosive: Complete the mission "Long Way To The Top".
Motorhead: Complete all Campaign of Carnage side missions.
Obsessed: Collect 10 pictures of Moxxi in Campaign of Carnage.
The following achievements require the "Sir Hammerlock's Big Game Hunt" bonus downloadable content:
Face Off: Completed the mission "The Fall of Nakayama".
Done That: Completed all Hammerlock's Hunt side missions.
Been There: Discovered all named locations in Hammerlock's Hunt.
The following achievements require the "Tiny Tina's Assault On Dragon Keep" bonus downloadable content:
I Totes Planned That Boss: Slew Mister Boney Pants Guy.
Yaaaaaay: Introduced thyself to the White Knight.
Shorty, You So Best: Completed thy quest by rescuing yonder queen.
Girl's Gotta Eat: Fed thy noble queen 3 times during one visit to her quarters.
It's Like That One Video: Showed thine worst enemy, the abomination known as "The Darkness," who is the nerdiest of them all.
They Was All "Hey That's Mine": Unsheathed 5 swords from Immortal Skeletaurs without leaving the area.
Dang Girl You Ace At This Game: Won the most challenging round in Murderlin's Temple.
Hmmmmm: Wielded the Mysterious Amulet.
Keep Rollin' Rollin' Rollin': Demonstrated your skill, or lack thereof, at rolling the magical treasure orb of many sides.
Make it Raaaaaid: Vanquished the Ancient Dragons of Destruction.
True Vault Hunter mode
Successfully complete Story mode under the Normal difficulty setting.
Have a saved game file from Borderlands to unlock characters skin from the original game.
Easy Badass ranks
Create a new character and join the game as a guest on controller two. Stand in front of the guest character with your main character and start a duel. Win the duel and repeat the process. Fifty duel victories will result in a gain of 166 Badass ranks. Create a new character and repeat the process as many times as desired.
Go to Sanctuary Hole after Chapter 9. Jump off a cliff then go to Caustic Caverns. Run northwest to Guardian Ruins then go to the minecarts and turn right. Jump over the rectangular rocks then turn left to find Minecraft dirt. Break though it to reach Minecraft stone, cobblestone, and coal. Break though those to find Creepers, as well as blocks of gold, diamond, iridium and more. Kill the Badass Creeper to unlock Minecraft-themed skins (Steve Head, Steve's Clothes etc.).
Sign up for the Gearbox Shift program that is found under the "Extras" in-game menu. Then, enter one of the following codes to unlock the corresponding Halloween costume. Note: These codes are only valid from October 31, 2012 through November 4, 2012.
"Fright Of The Bumblebee" costume for Siren (Maya): Enter "WTKBJ-XRHTW-C63BT-JTB33-J6C9T" as a Shift code.
"Hornet's Nest" costume for Assassin (Zer0): Enter "5J5JB-B9S35-W6J33-3BJBT-33JSF" as a Shift code.
"Killer Bee" costume for Gunzerker (Salvador): Enter "CTK3J-9XH3W-CRB3J-33TBJ-9JJHW" as a Shift code.
"Stinger Missile" costume for Mechromancer (Gaige): Enter "W3WBJ-C6ZB5-C6JJT-33JJB-JSFX6" as a Shift code.
"Yellowjacket" costume for Commando (Axton): Enter "KT53J-36HBK-W6JJ3-BJJB3-WH95H" as a Shift code.
True Vault Hunter mode
Successfully complete the game to unlock True Vault Hunter mode.
Infinite Golden Keys
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "WillowDLC.ini" file in the "\Steam\steamapps\common\Borderlands 2\DLC\POPremierClub\Lic" folder. Locate the following lines:
Change the "+Numkeys=1" value from "1" up to "255" to get the desired number of Golden Keys. The Golden Keys can be used to open the Golden Loot chest found in Sanctuary near the Fast Travel terminal. Each time you open the chest, it will use one key and give you rare weapon(s) or item(s) that are scaled to the current level you are at when you open the chest. Note: This glitch was done on an unpatched version of the game.
All promo items
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "WillowDLC.ini" file in the "Steam\steamapps\common\Borderlands 2\DLC\POPremierClub\Lic" folder. Locate the following lines and update them to match how they are listed below to unlock all promo items:
Note: This glitch was done on an unpatched version of the game.
Duplicating weapons, items, and money
Start a co-op game with at least one other player. Stand next to another player, and initiate a trade. Give them the desired weapons/items/money you would like to duplicate. Then, immediately quit the game without saving. Since the game did not save after you traded the weapons/items/money, you will still have them, and the other player you traded them to will also have them. The other player can then give you weapons/items/money while using the same method. Repeat this as many times as desired. Note: Do not trade items near an auto save point to prevent the game from accidentally saving while trading the items.
Infinite Badass points
Note: This trick requires a character with at least $3 million. Create a new character, and start a game with both characters. Have the character with $3 million as player one and the new character as player two. Have player one trade $3 million to player two. You will get an extra 167 Badass points added to your profile. Then, have player two give the money back to player one. Next, have player two leave the game. Then, have player two join the game, but first delete the character player two was using, and create a new one before joining the game. Give the new character created for player two $3 million again to get another 167 Badass points. Repeat this as many times as desired.
Since Badass points are assigned to your profile and not a specific saved game file, it is possible to get an unlimited number of Badass points easily. Create a new character and have a second player join the game as a guest on controller two. Stand in front of the guest character with your main character, and keep activating a trade with each other. Trades count whether you actually trade anything or not. Simply activate "Trade" without actually offering anything to still have it count as a trade. Do this 50 times to get a total of 166 Badass points. Then, create a new character and repeat the process as many times as desired. You can delete all the unwanted created characters once you are finished using this trick. Note: You can also do this with dueling. Stand in front of the guest character with your main character, and start a duel. Win the duel, and repeat the process. Fifty duel victories will result in a total gain of 166 Badass points. This can be done even quicker by setting up the controller configuration so you can keep tapping [Melee/Attack] without changing your aim at the second player.
In Three Horns Valley, go northwest on the map to the hideout where you fight the Bad Maw boss (the area is right next to the entrance to Bloodshot Stronghold. Kill Bad Maw, and pick up the Eridium he drops. Then, enter the Bloodshot Stronghold, and choose the "Save and Quit" option. Continue the game, return to Three Horns Valley, and kill Bad Maw again to get more Eridium. Repeat this as many times as desired. Note: This glitch was done on an unpatched version of the game.
This glitch requires a full inventory and a Vladof rocket launcher. Start with the rocket launcher on the ground. Have a separate gun in your hand that uses one round of ammo per shot. While hovering over the rocket launcher (you should see the "Full" icon), swap it with the current weapon you are holding. Fire one round with the rocket launcher, then swap back to your other gun. You should now have unlimited ammo, but not unlimited rockets or grenades. Note: Certain weapons that consume more than one round of ammo per shot are also not unlimited, but all your single shot weapons should be. This must be repeated whenever the game is loaded. Additionally, this glitch was done on an unpatched version of the game.
In Tundra Express, complete all the optional quests for Tiny Tina that lead up to the "You Are Cordially Invited: RSVP" quest. This quest requires you to lure Flesh Stick into Tiny Tina's cave so she can put him in a trap. However, if you just kill him, you will get a large amount of XP, depending on what level you are (level appropriate on the first playthrough is between 1,800-3,000 XP per kill, and the second playthrough is between 2,000-4,500 XP per kill). Once you kill Flesh Stick, just go back to Tiny Tina, and restart the quest. If you are playing with at least one other player, simply have one person stand by Tina while the other player stands by Flesh Stick's spawn, and he should keep appearing. Note: If Flest Stick's stops respawning, you can either go back to the starting area, exit and return; or choose to "Save and Quit", and then reload the game. Additionally, this glitch was done on an unpatched version of the game.
After completing the "A Dam Fine Rescue" mission, you will find Sir Hammerlock inside Sanctuary offering a quest called "Mighty Morphin'", which involves taking an injector and injecting Varkid Cocoons with a special serum. Injecting the serum into a cocoon produces a Badass Varkid. Killing one yields around 1,900 XP during your first playthrough, depending on your level. As long as you do not complete or turn-in the quest, you can kill all the enemies, choose to "Save and Quit", and reload the game to have the enemies respawn. Repeat this as many times as desired.
Quickly reaching Level 50 with new character
Defeat The Warrior with a Level 50 character. When you are given the option to either kill Jack or let Lilith kill him, jump into the lava. The game will then automatically be saved with Jack and The Warrior defeated. Next, choose the "Save and Quit" option. When you choose to continue the game, you will start near Jack with the requirement to still kill him. Then, invite a character you want to easily level-up to 50. Once they have joined the game, have your Level 50 character kill Jack, wait three seconds, and then reset the game for the Level 50 character so the game is not saved. The new character will receive the XP given for killing Jack, but the Level 50 character's game will not be saved after killing Jack. Repeat this for approximately an hour to get the new character to Level 50.
Better weapons and items
Go to any slot machine after the game has recently been auto saved. Play the slot machine as many times as desired. If you do not like the weapons and/or items you won, simply quit the game without saving. Then, continue your saved game to still have all the money you spent on slot machine. Repeat this process as many times as desired to get better weapons and items.
Better mission weapons
When turning in a mission that gives you a weapon as a reward, usually the stats of the weapon are randomly generated (and in some cases elements). Thus, if you do not like the weapon you are given after turning in a mission, simply quit the game without saving before the game auto saves. Continue your game, and turn the mission in again to get a weapon with different stats. Repeat this until you get a weapon with desired stats and/or elements. -From: Psychotic Elf
Legendary (orange) loot locations
The following is a list of Legendary (orange) items that certain bosses and enemies in the game will drop, and the area(s) you can find those bosses/enemies. To increase your chances of getting a Boss or enemy listed below to drop a Legendary (orange) item, play Co-Op with four players. If you do not get the Boss/enemy to drop the item, leave the area and return to fight them again. Keep doing this (farming) until they drop the item(s). Note: There is a very small chance a Boss or enemy will drop a Legendary (orange) item. Thus, it can take a very long time to get them to drop the desired item. It is also possible to get some of these items from other enemies in the game. Additionally, there are certain bosses you cannot fight until you have completed the game (Terramorphous and Vermivorous the Invincible).
Hammer Buster - McNally, The Dust (Mission: The Bane)
KerBlaster - Midge-mong, Southern Shelf
Madhous! - Mad Dog, Lynchwood
Shredifier - Bonehead 2.0, Arid Nexus
Veruc (Slag) - Mobley, The Dust
Gub - Laney, The Fridge
Gunerang - Rakk Man, The Fridge
Hornet - Knuckledragger, Southern Shelf
Infinity (Caustic) - Doc Mercy, Southpaw Steam & Power (Side Mission: Medical Mystery)
Logan's Gun - Wilhelm, Snowblind Defile (Mission: A Train To Catch)
Maggie - Mick Zafod, The Dust (side with Hodunks)
Thunderball Fists - Captain Flynt, Southern Shelf
Unkempt Harold - Savage Lee, Three Horns
Badaboom - King Mong, Eridium Blight
Bunny - Chubby enemies
Mongol - Dukino's Mom, Lynchwood
Norfleet - Vermivorous the Invincible, Tundra Express and Caustic Caverns
Nukem - Black Queen, The Dust
Pyrophobia - Incinerator Clayton, Frostburn Canyon (Mission: Cult Following - The Enkindling)
Conferance Call (Fire) - The Warrior, Hero's Pass
Deliverance - Tumba, Wildlife Preserve
Flakker - The Warrior, Hero's Pass
Sledge's Shotgun - Smash Head, The Fridge
Striker - Old Slappy, The Highlands - Outwash
Invader - Saturn, Arid Nexus - Badlands (Mission: Data Mining)
Longbow - Badass Creeper, Caustic Cavern
Lyuda (Slag/Shock) - Gettle, The Dust
Pitchfork (Fire/Slag/Caustic) - Terramorphous, Terramorphous Peak
Skullmasher - Son Of Mothrakk, Wildlife Preserve
Volcano - The Warrior, Hero's Pass
Baby Maker - Madame Von Bartlesby, Tundra Express (Side Mission: You Are Cordially Invited - Party Prep) / Mad Dog, Lynchwood
Bitch - BNK3R, The Bunker (Mission: Where Angels Fear To Tread)
Emperor - The Assassins, Southpaw Steam & Power
Hellfire - Scorch, Frostburn Canyon / The Warrior, Hero's Pass
Slagga - Hodunk, The Dust
Black Hole - Foreman, Opportunity
Fabled Tortoise - Blue, Caustic Caverns
Hide Of Terramorphous - Terramorphous, Terramorphous Peak
Impaler - The Warrior, Hero's Pass
Neogenator - Spycho, Frostburn Canyon
The Bee - Hunter Hellquist, Arid Nexus - Badlands
The Cradle - Henry, Overlook (Side Mission: Best Mother's Day Ever)
The Sham - BNK3R, The Bunker (Mission: Where Angels Fear To Tread)
The Transformer - Pimon, Wildlife Preserve
Whiskey Tango Foxtrot - Chubby enemies
Bonus Package - Boom Bewm, Southern Shelf
Bouncing Bonnie - Loot Midgets
Fastball - Boll, Three Horns
Fire Bee - Unknown
Leech (Fire/Shock/Caustic) - The Warrior, Hero's Pass
Nasty Surprise - Vermivorous the Invincible, Tundra Express and Caustic Caverns
Pandemic - Badass Constructor
Quasar - Ultimate Badass Varkid
Rolling Thunder - Wilhelm, Snowblind Defile (Mission: A Train To Catch)
Storm Front - Rat Brothers, Bloodshot Stronghold
Legendary (Siren/Commando/Gunzerker/Assassin) - Vermivorous the Invincible, Tundra Express and Caustic Caverns
Slayer Of Terramorphous (Siren/Commando/Assassin/Gunzerker) - Terramorphous, Terramorphous Peak
Blood Of Terramorphous - Terramorphous, Terramorphous Peak
Have a saved game file from the original Borderlands on your hard drive to unlock the Veteran skins for all four characters using the option found under the "Extras" menu.
If you keep tipping Moxxi large amounts of money in Sanctuary (over $10,000), she will eventually give you a weapon. Try to tip after she stops talking. Once you get a weapon from her, you can fast travel to another area and then back to Sanctuary. Keep tipping her again to get another weapon. She only gives two types of weapons -- a fire elemental submachine gun and corrosive elemental submachine gun, but they should always have different stats.
Carrying an extra item in inventory
This trick requires two class mods. Once your inventory is full, switch your currently equipped class mod for another one in your inventory (you can then re-equip your original class mod after you have done this). Then, exit the inventory menu to be able to now pick up one additional item, allowing you to have up to 28 items in your inventory instead of the normal maximum of 27.
Getting Golden Keys
Golden Keys can be used to open the Golden Loot chest found in Sanctuary near the Fast Travel terminal. Each time you open the chest, it will use one key and give you rare weapon(s) or item(s) that are scaled to the current level you are at when you open the chest. Thus, make sure you do not open the cheat with a Golden Key until you want a rare weapon for the current level you are at. There are multiple ways to get a Golden Key. Certain retailers gave a DLC code to people who pre-ordered the game that included a Golden Key. You can also sign-up for the Gearbox Shift program that is found under the "Extras" menu in-game to get a Golden Key. Gearbox has also stated they are planning on giving away more Golden Keys through future promotions and events. The news ticker at the Borderlands 2 menus will provide more information about the Golden Key promotions and events.
Good loot farming chest
In the Vault Of The Warrior, you will reach a bridge to walk over the lava (there is a lava fall to the right of the bridge) shortly after entering the area. Jump down the lava hole to the left of the bridge. Once you go down the hole, move forward to find a small cove with a red loot chest on the right. The loot chest contains good items. Once you grab the items, select the "Save and Quit" option to have the chest refill. Repeat this as many times as desired.
Easy Badass tokens
To easily get Badass tokens early in the game, use the following methods:
Dueling: Defeat players 50 times while dueling to complete this challenge and get 166 total Badass points. To easily do this, have two players unequip any mods and shield from their character. Then, initiate a duel by having one player melee the other player. Take turns defeating each other until both players have 50 duel wins each.
Reviving: Revive a downed player 50 times to complete this challenge and get 166 total Badass points. To do easily do this, have two players that can kill themselves. Find or purchase a Tediore weapon. These weapons are thrown and explode when reloaded. Unequip any mods and shield from your character. Then, stand in a corner, shoot the Tediore gun once, and reload. You will throw the gun into the corner and hurt your character when it blows up. Once you go down, have the other player revive you. Then, have the other player do the same thing with their character. Repeat this until both players have 50 revives each.
Selling: Sell items 50 times to complete this challenge and get 166 total Badass points. To easily do this, go to any vending machine and sell an item, then buy it back for the same price you sold it, and then sell it again. Repeat this until you have completed the "Wholesale" challenge.
Trading: Trade with another player 50 times to complete this challenge and get 166 total Badass points. To easily do this, have two players keep activating a trade with each other while standing next to each other. Trades count whether you actually trade anything or not. Simply activate "Trade" without actually offering anything to still have it count as a trade. Do this 50 times to complete the "Psst, Hey Buddy..." challenge.
Fighting Dexiduous The Invincible ("Sir Hammerlock's Big Game Hunt" DLC)
To summon the secret Dexiduous The Invincible Boss, you will need 99 Eridium shards and to have successfully completed all the main story missions in the "Sir Hammerlock's Big Game Hunt" downloadable content. Then, deposit between 20-25 Eridium shards in the four totems scattered around Hunter's Grotto. Look for a totem with a black furnace full of purple Eridium at its base. The totems are located in the following areas in Hunter's Grotto:
Totem 1: It is in the far southern corner of the Grotto, in the slightly more narrow passage with lots of native wall paintings.
Totem 2: Travel west to a tribal camp on a high cliff overlooking the water. It is in the center of the western section of the Grotto.
Totem 3: It is east of the large gap in the map where the first totem was located. Cross over to the eastern section across the gap, and look for a camp in the center with elevator access. Use the elevator, and you will exit out to another camp with the totem out in the open.
Totem 4: It is directly north of the third totem. Travel up to the cliff and jump off, and you will be able to see it near the water and another small cluster of buildings below.
Once you have lit all four totems, travel to the center of the northern section of Hunter's Grotto. Look for a new totem with four lit torches. Pull the lever when you are ready to fight him. Dexiduous The Invincible spawns in the center of a large plain, with only a single rock to mark its location. You will first fight a few waves of enemies, and then Dexiduous The Invincible will appear. Note: If you leave the game or area, you will lose any spent Eridium, and must complete every step to summon Dexiduous again.
Hidden QR code
If you look on Mad Moxxi's pizza boxes, there is a QR code. When you scan the code, it says: "Wise man say, forgiveness is divine but never pay full price for late pizza. -Captain Picard." -From: Psychotic Elf
Defeating The Warrior easily
When you begin the battle with The Warrior, let him immediately kill you. You will then spawn behind a shielded barrier protecting The Warrior. Climb up on the rocks to the left to get above the shielded barrier, allowing you to shoot The Warrior from a distance without him harming you. Note: After defeating The Warrior, leave the area, and return to the area for him to respawn.
Dark Souls Easter Egg
In Caustic Caverns, go to the far eastern area of the map. Once you find the unique Crystalisk monster named Blue, run north across the corrosive green waters to the small island with a lone tree out in the distance. You must be at a high enough level to make it across, as you will take a lot of damage while running across the water. If you are using Salvador (the Gunzerker), you can activate his Gunzerk ability to gain health. On the island, you will find a bonfire. Sitting nearby is a Knight named Solitaire, a reference to the Knight Solaire in Dark Souls. You can also find a phantom spirit.
Dr. Tannis Easter Egg
Dr. Tannis, the Dahl Corporation scientist, could be found riding a fish while a dramatic soundtrack played in Treacher's Landing in the original Borderlands by shooting five barrels in a specific order. This can also be done in Borderlands 2. Fast travel to Sawtooth Cauldron. Go forward, and jump off the cliff to reach Sawtooth Stilts. Then, turn left, and go through Smoking Guano Grotto. You will eventually reach the Main Street Reservoir area. Continue until you are at the very edge of the map, on a beach overlooking the reservoir. Scattered around the beach are five colored barrels. Shoot them in the following order to activate the Easter Egg:
Blue barrel: Next to the arid plant-life near the water.
Red barrel: Turn around to face the huts; the barrel is at the left hut.
Green barrel: Turn around again, and look out at the reservoir. Move closer to the edge of the water, and look out at one of the small islands.
Yellow barrel: On the left, behind a wooden barricade.
Purple barrel: On the right, near a pile of tires.
Minecraft Easter Egg
Once you reach Sanctuary Hole after Chapter 9 (it can be accessed from the northeast area of the map in Three Horns Divide), you will find a cliff that drops off into a huge hole on your right behind a building close to the end of the town you go through immediately after entering Sanctuary Hole. It does not look like you can drop off the edge, but there is an area you can drop onto. Drop down to this area to reach the entrance to Caustic Caverns. You can also reach the entrance to Caustic Caverns by progressing through Sanctuary Hole normally. Once you enter Caustic Caverns, go to the "Guardian Ruins" at the northwest corner of the map. Find the mine carts on the train tracks, and turn right just before you reach the huge door at the end of the train tracks. Then, go straight, jump over the two cube blocks, and immediately turn left to enter a cave with a bunch of Minecraft blocks. Keep smashing the blocks to enter a secret Minecraft area. There are Minecraft style enemies in this area. You can fine a special Minecraft head and skin for your character by defeating the enemies and smashing the blocks in this area. There is a different head and skin dropped in this area for each character. The enemies also drop rare loot. If you do not get the desired head and skin for a character and/or do not like the loot you got, you can choose to "Save and Quit", and then continue your game to get different loot in this area.