Here is the full list of all 40 Green Lantern: Rise of the Manhunters achievements worth 1,000 gamerscore.
Purchased all Ring Power upgrades.
Purchased all upgrades.
Purchased all Ring Surge upgrades.
Made Green Lantern dizzy 10 times.
Purchased all Attack upgrades.
Completed the game on poozer or enforcer difficulty.
Cleared mission 10.
Defeated 20 enemies with Jet Fighter.
Cleared mission 9.
Gained experience level 10.
Cleared mission 8.
Purchased all Construct upgrades.
Cleared mission 7.
Defeated 10 enemies with Piston Blitz.
Defeated 20 enemies with Mech Suit.
Cleared mission 6.
Defeated 20 enemies with Missile Pack.
Performed a 99 hit combo.
Cleared mission 5.
Cleared mission 4.
Used Ring Surge 10 times.
Defeated 10 enemies with Gatling Gun.
Defeated 10 enemies with Rocket Punch.
Defeated 10 enemies with Baseball Bat.
Defeated 10 enemies with Hover Mines.
Defeated 10 enemies with Blade Whip.
Cleared mission 3.
Gained experience level 5.
Defeated 20 enemies with Mace Storm.
Launched 20 enemies.
Defeated 10 enemies with War Hammer.
Cleared mission 2.
Cleared a mission in Co-op.
Cleared mission 1.
Performed a 50 hit combo.
Defeated 10 enemies with Ring Blaster.
Performed a 20 hit combo.
Clear all missions on Emerald Knight difficulty.
Collect all 5 Blue Meteorites.
Collect all 9 Green Meteorites.