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