Full list of all 44 Assassin's Creed achievements worth 1,000 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Achievements they've won
Achievements they've not won
A strange vision has appeared to you. What could it mean?
Complete Assassin's Creed.
Go through every dialog with Lucy.
You've slain Robert de Sable, but there is one more...
Assassinate all your targets with a full DNA bar.
See 85% of all the memory glitches.
Kill every Templar.
Find All Flags in Jerusalem.
Complete every free mission in Jerusalem.
Complete all Reach High Points.
You've slain Sibrand, the Teutonic Leader of Acre.
Find All Teutonic Flags in Acre.
Complete every free mission in Acre.
You've slain Jubair, the Scribe of Damascus.
Find All Flags in Damascus.
Pickpocket 200 throwing knives.
Complete every free mission in Damascus.
Have a complete Synchronization bar.
You've slain Majd Addin, Regent of Jerusalem.
Kill 75 guards by throwing knives.
You've slain Abul Nuqoud, Merchant King of Damascus.
Perform 50 Combo Kills in Fights.
Assassinate 100 guards.
You've slain William of Montferrat, Liege-Lord of Acre.
Find all Templar Flags in Acre.
Find All of Richard's Flags in the Kingdom.
You've slain Garnier de Naplouse, Hospitalier Leader in Acre.
Grab and Throw 25 Harassers.
Find All Hospitalier Flags in Acre.
Perform 50 leap of faith.
Last 10 minutes in open conflict.
Defeat 25 guards in a single fight.
Perform 50 stealth assassinations.
You've slain Talal, Slave Trader of Jerusalem.
Jump through 20 merchant stands.
Perform 100 Counter Kill in Fights.
Defeat 100 opponents without dying.
Find All Flags in Masyaf.
You've slain Tamir, Black Market Merchant in Damascus.
Kill one of your main targets like a true assassin.
Use Scholar blending 20 times.
You have found the traitor and have brought him before Al Mualim.
You've protected Masyaf from the Templar invasion.
You've successfully completed the Animus tutorial.