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.
You've made a friend within the walls of Abstergo Industries.
Every Templar has fallen to your hand.
You've collected every Flag in the Kingdom belonging to Richard.
You've collected every Damascus Flag.
You've collected every Jerusalem Flag.
You've collected every Teutonic Flag in Acre.
You've collected every Templar Flag in Acre.
The people of Jerusalem will be forever grateful for what you've done.
Nothing can hinder the descent of an Eagle. Over 50 people have fallen to your relentless attacks.
The people of Damascus will be forever grateful for what you've done.
You've discovered every Reach High Point.
A strange vision has appeared to you. What could it mean?
Completed Assassin's Creed.
You've slain Robert de Sable, but there is one more...
You've witnessed Altair's Memorable Moments in all their splendor.
You've fully honored the tenets of the Creed. You are a Master Assassin.
You've slain Jubair, the Scribe of Damascus.
You've collected every Masyaf Flag.
You've slain Sibrand, the Teutonic Leader of Acre.
Desmond and Altair have been completely synchronized.
The people of Acre will be forever grateful for what you've done.
You were bold enough to challenge 25 soldiers in a single fight... and win.
You've collected every Hospitalier Flag in Acre.
You've slain Majd Addin, Regent of Jerusalem.
You've slain William of Montferrat, Liege-Lord of Acre.
You've slain Abul Nuqoud, Merchant King of Damascus.
You've soared with the eagles and landed safely over 50 times.
You've slain Talal, Slave Trader of Jerusalem.
You managed to scare away 25 beggars. I hope you're proud of yourself.
Scholars know you well and have helped you over 20 times.
You've gathered quite a supply of throwing knives.
Over 100 people have witnessed your deadly performance with a blade.
Over 100 city guards have fallen to your hunt.
Over 75 guards were felled by your knives.
The Merchants of the land now know you VERY well.
Survival at its best, for over 10 minutes, nothing was able to hinder your flight.
You remain undefeated for over 100 battles.
You've slain Garnier de Naplouse, Hospitalier Leader in Acre.
Over 50 people have felt the deadly sting of your blade.
You've slain Tamir, Black Market Merchant in Damascus.
Like a Blade in the Crowd, your target never knew his death laid wait within his very shadow.
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.