Command & Conquer [N64]
On the Title screen -where players see "Press Start" - enter the following code using the Control Pad: B, A, R, R, A, C-Right, Up, Down, A. There will not be any indication that the code has worked. Select "Replay Mission" from the main menu, then press the L Button to display all of the missions (the R button chooses which side you are playing).
Hold L press C-Up or C-Down to zooom in and out of the battlefield.
Build a Tiberium Refinery. Sell the actual refinery and you will receive $1,000 credits. You end up with an ore truck. You save $200 credits. If you were to build and ore truck through a war factory, it would cost $1,200 credits
Place your Mini-Gunners really close to a sand bag wall and sell the wall. If your men were close enough, and it works right, your men have been sold.
Use sandbags to build all the way to your enemies base. Now build some defenses, guns or whatever to take them out! A ton of turrents is especcially effective!
Place a not wanted vehicle on a repair bay and put the sell cursor over the vehicle and preess "A".
Be able To Build Opponent's Units:
Get your engineer to take over a enemies construction yard and you can build their units
Build sandbags around your base with one gap and the enemy will only atack through the route as the AI doesn't recognise it as a target.
While playing as the Global Defense Initiative (GDI) on mission 6, gain access to the Air Attack. Then order your bombers to fly toward the lower left-hand corner of the screen and destroy a designated target. Follow the planes. As their bombs plummet to the ground, you should see a UFO hovering in the cleared area!
Steal Enemy Harvesters:
You can steal the enemy's harvester by capturing the refinery while the harvester is depositing money into it. This comes in handy on earlier missions when you cannot build more harvesters.
Need an Orca but don't have enough money? Instead of buying it, simply build another heli-pad... and then scrap it. You will be able to keep the Orca that came with it and save 450 credits!
If you're playing as GDI, and you have access to APCs and Engineers, then you can try this trick. Build 2 APCs, and put them each to a C-button. Now build 10 engineers, split hem into 2 groups of 5, put each group on a C-button, and load each group onto an APC. Now, drive the APCs over to the enemy base, and park them next to the NOD construction yard/barracks/airstrip. If the APCs are blown up, it's okay, the engineers will walk out still alive. Send all the engineers into NOD buildings, going into the construction yard first. Now, whenever you blow up a NOD building, they won't be able to replace it. And, if you captured their Hand of Nod or airstrip, then they won't be able to build any more units if you blow them all up.
Highlight a unit to be created from the toolbar, then press A. Hold Z and press A after receiving the "Unit Ready" or "Construction Complete" message to build the same unit again without returning to the toolbar.
Destroy the churches in the villages to find $1000.
Build NOD attack chopper:
To build an attack chopper for the Brotherhood of NOD, simply take over their main base and the option for an attack chopper will become available.
Faster Ion Cannon and Nuclear Weapon charge:
Build more power plants to get a faster Ion Cannon and Nuclear weapon charge.
Taking out Lasers:
The fastest and easiest way to take out Lasers is to use three flame tanks -- you will barely get damaged.
Taking out Guard Towers and Advanced Guard Towers:
Build Artillery and send them to attack those structures. They shoot from such a long distance that the Towers can not shoot back.
When you destroy all your opponent's Tiberium Factories, you can shoot one of their structures a few times for them will sell to it. However, make sure you take out their main base first or they will not be able to rebuild the Tiberium Factories.
Keep tanks from getting destroyed:
Get some men and put them in the front of your tank. When the enemy opens fire, they will shoot at the men instead of the tank.
Enemy shoot each other:
Take a quick unit and speed it through two enemy units to get them to shoot each other.
Distracting the enemy:
You can use units such as mini-gunners to distract the enemy and overwhelm them. They will not attack until the gunner dies.
Run the enemy out of money:
First find the enemy base, then find all the ways in and out. Once you've done this build sandbags all the way up to the enemy base and block off the entrance (be carefull that you don't get too close to the entrance you've just blocked off or the enemy will shoot a hole in your barrier). The enemy harvestors can't get in to get to the refineries and they can't get out to harvest, therefore the enemy runs out of money and it is a lot easier to destroy their base. The AI is too dumb to do anything about this.