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
Find All Flags in Masyaf.
You've slain Tamir, Black Market Merchant in Damascus.
You've slain Garnier de Naplouse, Hospitalier Leader in Acre.
You've slain Talal, Slave Trader of Jerusalem.
Defeat 100 opponents without dying.
Kill one of your main targets like a true assassin.
Perform 100 Counter Kill in Fights.
Perform 50 leap of faith.
A strange vision has appeared to you. What could it mean?
Complete Assassin's Creed.
See 85% of all the memory glitches.
You've slain Robert de Sable, but there is one more...
Assassinate all your targets with a full DNA bar.
Defeat 25 guards in a single fight.
Use Scholar blending 20 times.
You've slain Sibrand, the Teutonic Leader of Acre.
Have a complete Synchronization bar.
You've slain Jubair, the Scribe of Damascus.
You've slain Majd Addin, Regent of Jerusalem.
You've slain William of Montferrat, Liege-Lord of Acre.
Perform 50 stealth assassinations.
You've slain Abul Nuqoud, Merchant King of Damascus.
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.
Kill every Templar.
Find All of Richard's Flags in the Kingdom.
Find All Flags in Jerusalem.
Find All Flags in Damascus.
Complete all Reach High Points.
Complete every free mission in Acre.
Complete every free mission in Jerusalem.
Complete every free mission in Damascus.
Go through every dialog with Lucy.
Last 10 minutes in open conflict.
Assassinate 100 guards.
Perform 50 Combo Kills in Fights.
Pickpocket 200 throwing knives.
Kill 75 guards by throwing knives.
Grab and Throw 25 Harassers.
Jump through 20 merchant stands.
Find All Teutonic Flags in Acre.
Find all Templar Flags in Acre.
Find All Hospitalier Flags in Acre.