Here is the full list of achievements you can unlock for The First Templar on the Xbox 360, with the gamer points listed in parenthesis. There are also several secret achievements listed at the bottom.
A Friend in Need (15) – Played in an online multiplayer game with one of your Xbox LIVE friends
A Friend Indeed (30) – Finished all levels in the campaign in multiplayer online mode
Arsenal (30) – Found all collectible weapons in the game
Bull Rush (20) – Hit 4 enemies at the same time with your Charge Attack
Charge! (15) – Acquired all Charge skills for Celian
Chronicles of the Temple (50) – Found all Templar Chronicles
Daggermistress (15) – Acquired all Dagger Throw skills for Marie
Dedicated (40) – Completed all Bonus Objectives on all levels
Destructive (15) – Smashed 5 enemy shields
Down, boy! (15) – Saved your partner from a dog attack
Executor (30) – Finished 30 fallen enemies
Expert Tracker (15) – Successfully tracked 20 trails to their end
Fight back (25) – Successfully performed 10 countermoves
Healing Hands (20) – Healed your partner
Juggernaut (15) – Advanced a character to 5 Health Orbs
Just a flesh wound (25) – Finished a whole level without both characters dropping below 1 Health Orb
Long Ranged (20) – Killed 20 enemies with a ranged attack
Look out below! (20) – Killed an enemy by knocking him from a ledge
Miracle Worker (20) – Used the “Revive” action to help your teammate
No escape (25) – A fleeing enemy was killed with a siege weapon by you or your partner
No Stone Unturned (10) – Destroyed a breakable wall
Not a Scratch (20) – Killed 5 enemies in less than a minute without taking damage
Observant (20) – Discovered with a clue
Pyromaniac (10) – Set 50 objects on fire
Siege Operator (30) – Killed all opposing squads with a siege weapon
Silent and deadly (20) – Performed 50 stealth kills
Strength of Two (20) – Finished a level in an online multiplayer game
Team Tactics (20) – Killed an enemy grabbed by the other character
Templar Grand Master (50) – Completed all levels on Hard difficulty
Templar Knight (20) – Completed all levels on Casual or higher difficulty
Templar Master (30) – Completed all levels on Normal or higher difficulty
The Duelist (30) – Won a duel
Thorough (20) – Completed all Bonus Objectives in a single level
Treasure-Hunter (20) – Discovered all chests in a single level
Vigour (20) – Advance a character to 5 Zeal Orbs
Wardrobe (30) – Found all collectible outfits in the game
Watch Your Step (10) – Disarmed a bear trap
Well Traveled (20) – Completed 5 levels in online multiplayer with different partners
What was that? (20) – Stealth killed a noise distracted enemy
Whirlwind Strike (20) – Hit 4 enemies at the same time with your All-around Attack
Here is the list of secret achievements you can unlock for an additional 100 gamer points.
A Lady with an Attitude (10) – Rescued Marie d’Ibelin
An Honourable Enemy (15) – Defeated Muzafar
Beast-Slayer (10) – Defeated the Beast
Friday the 13th (15) – Survived the events of Friday the 13th
Saviour of Acre (10) – Survived the siege of Acre
The Cup of Christ (15) – Found the Grail
The Hero of Cyprus (10) – Rescued the messenger of King Philip
The Lost Temple (15) – Explored the Temple of the Nine