Assassin's Creed - Achievements

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