Here is the full list of all 49 Robert Ludlum's The Bourne Conspiracy achievements worth 1,000 gamerscore.
Finished a mission with an accuracy below 10%
Finished 3 missions with an accuracy of at least 90%
Finish off 200 opponents using shooting takedowns
Finish a mission without using any hand-to-hand takedowns
Completed all campaign missions on Agent or higher
Completed all campaign missions on Trainee or higher
Completed all campaign missions on Assassin
Completed Treadstone Safehouse
Collected all Passports in Treadstone Safehouse
Collect all Passports
Defeat 100 opponents with contextual takedowns
Defeat 200 opponents in hand-to-hand without performing a takedown
Finish off 200 opponents using hand-to-hand takedowns
Finished a mission without using a shooting takedown
Finished a mission with an accuracy of at least 75%
Finished a mission with an accuracy of at least 90%
Take out multiple opponents with one takedown 30 times
Completed Survive the Professor
Collected all Passports in Survive the Professor
Completed Disarm Renard
Collected all Passports in Disarm Renard
Defeat 100 opponents in hand-to-hand without performing a takedown
Use three full bars of Adrenaline while driving through the streets of Paris
Completed Paris Chase
Rampage through Paris: Destroy the cafe, china shop, and 200 props
Completed Castel Fight
Completed Silence Rurik
Destroy 50 explodables
Collected all Passports in Silence Rurik
Kill 150 enemies with headshots
Completed Escape the Embassy
Collected all Passports in Escape the Embassy
Completed Eliminate Divandelen
Collected all Passports in Eliminate Divandelen
Finish off 50 opponents using shooting takedowns
Collected 30 Passports
Finish off 50 opponents using hand-to-hand takedowns
Completed Assassinate Wombosi
Collected all Passports in Assassinate Wombosi
Defeat 50 opponents in hand-to-hand without performing a takedown
Completed Shipyard Infiltration
Defeat 20 opponents with contextual takedowns
Collected all Passports in Shipyard Infiltration
Destroy 10 explodables
Kill 25 enemies with headshots
Take out multiple opponents with one takedown 3 times
Collected all Passports in Dangerous Beginning
Collected 5 Passports
Completed Dangerous Beginning