Assassin's Creed [Xbox 360]

Complete the following achievements to unlock Xbox Live Gamerscore points.

The Eagle and The Apple - 1191 (100 points): Complete Assassin's Creed.
Personal Vendetta (40 points): Kill every Templar.
Keeper of the Lions Passant (25 points): Find All of Richard's Flags in the Kingdom.
Keeper of the Creed (10 points): Find All Flags in Masyaf.
Keeper of the Four Gospels (20 points): Find All Flags in Jerusalem.
Keeper of the Crescent (20 points): Find All Flags in Damascus.
Absolute Symbiosis (45 points): Have a complete Synchronization bar.
Fearless (25 points): Complete all Reach High Points.
Hungerer of Knowledge (20 points): See 85% of all the memory glitches.
Defender of the People: Acre (20 points): Complete every free mission in Acre.
Defender of the People:Jerusalem (20 points): Complete every free mission in Jerusalem.
Defender of the People: Damascus (20 points): Complete every free mission in Damascus.
Conversationalist (20 points): Go through every dialog with Lucy.
Disciple of the Creed (30 points): Assassinate all your targets with a full DNA bar.
Eagle's Will (20 points): Defeat 100 opponents without dying.
Eagle's Flight (20 points): Last 10 minutes in open conflict.
Eagle's Prey (20 points): Assassinate 100 guards.
Blade in the Crowd (30 points): Kill one of your main targets like a true assassin.
Eagle's Challenge (20 points): Defeat 25 guards in a single fight.
Eagle's Swiftness (20 points): Perform 100 Counter Kill in Fights.
Eagle's Dive (20 points): Perform 50 Combo Kills in Fights.
Eagle's Talon (15 points): Perform 50 stealth assassinations.
Eagle's Dance (10 points): Perform 50 leap of faith.
The hands of a Thief (15 points): Pickpocket 200 throwing knives.
March of the Pious (5 points): Use Scholar blending 20 times.
Eagle's Eye (15 points): Kill 75 guards by throwing knives.
Enemy of the Poor (5 points): Grab and Throw 25 Harassers.
Gifted Escapist (5 points): Jump through 20 merchant stands.
Keeper of the Black Cross (10 points): Find All Teutonic Flags in Acre.
Keeper of the Order (10 points): Find all Templar Flags in Acre.
Keeper of the 8 Virtues (10 points): Find All Hospitalier Flags in Acre.

Additionally, there are thirteen secret achievements all of which are currently unknown.