Here is the full list of all 40 D/Generation HD achievements.
Kill a survivor
Walk 1000 steps
Walk 5000 steps
Walk 100,000 steps
Kill 10 survivors
Kill all survivors
Completed the game
Completed the game, saved everyone and cleared all rooms
Finished game in under par time
Delivered the package to Derrida!
Escaped as the tower was coming down!
The tower came down on top of you
The DGen stole your jetpack
The DGen killed you and then escaped!
Swallowed by an AGen!
Crushed by a BGen!
Touched by a CGen!
Murdered by the DGen!
Shot by a worm!
Electrocuted 10 times
Electrocuted 100 times
Killed 100 times on your delivery
Killed an AGen
Killed a BGen
Killed a DGen
Throw 10 grenades
Killed by your own bomb
Used your gun for the first time!
Used your freeze ray for the first time!
Activated your shield for the first time!
Saved one person. It's something, I guess?
Saved an entire floor
Saved EVERYBODY!
Destroyed everything on a single floor
Destroyed everything in the tower
Picked up one security key!
Collected all the items
Entered Virtual Reality!
Killed once on your delivery
Killed a CGen!