Here is the full list of all 40 D/Generation HD achievements worth 1,000 gamerscore.
Get beaten to the jetpack by the DGen
Walk 1000 steps.
Get killed by the DGen before it escapes.
Die before the tower is destroyed.
Save all the people on one floor.
Destroy all objects on one floor.
Pick up a gun.
Kill a survivor.
Throw 10 grenades.
Visit all the rooms, save all the survivors and complete the game.
Use the freeze device.
Walk 100000 steps.
Kill all survivors.
Kill 10 survivors.
Save a survivor.
Save all the survivors.
Deliver the package to Derrida.
Complete the game but do not clear all the rooms.
Finish the game with a fast time.
Walk 5000 steps.
Escape just as the tower is coming down!
Be swallowed by an A-Gen
Be crushed by a B-Gen.
Be touched by a C-Gen.
Be killed by the DGen.
Be shot by a worm!
Be electrocuted 10 times.
Be electrocuted 100 times.
Be killed once on your delivery.
Be killed 100 times on your delivery.
Kill an AGen.
Kill a BGen.
Kill a CGen.
Kill the DGen.
Be killed by your own bomb.
Activate a shield.
Destroy everything in the tower
Pick up a security key.
Collect all the items
Enter virtual reality.