Here is the full list of all 44 G-Force trophies - there are 28 bronze, 12 silver, 3 gold and 1 platinum.
You have unlocked every other trophy
Completed game on "Easy" difficulty setting
Completed game on "Normal" difficulty setting
Completed game on "Challenging" difficulty setting
Completed game on "Special Agent" difficulty setting
Completed game twice
Completed game in under 8 hours (on any difficulty setting)
Progression
Collected 50% (25) of all Silver Data Disks in the game
Collected 100% (50) of all Silver Data Disks in the game
Spent more than 10000 SaberSense chips at kiosks.
Accumulate more than 5000 SaberSense chips
Purchased all new weapons and weapon upgrades (excluding ammo capacity)
Fully upgraded character with all possible weapons and upgrades
100 enemies defeated
500 enemies defeated
1000 enemies defeated
Defeated 100 enemies with Plasma Gun
Defeated 100 enemies with Cluster Rifle
Defeated 100 enemies with Flame Thrower
Defeated 100 enemies frozen by the Freeze Gun
Defeated 100 enemies with Shot Bolter
Defeated 50 enemies with Incendiary Charges
Defeated 50 enemies with RDV Pulse Cannon
Defeated 50 enemies with RDV Homing Missiles
Defeated 50 enemies using NanoHacked enemies
Achieved an average hit rate of at least 80% with projectile weapons
Walk more than 20km with Darwin
Fly more than 2km with Mooch
Scan 100 items in the game