Here is the full list of all 17 Zenodeath achievements.
The end begins here...
Finish Normal Mode
Finish Expert Mode
Finish Zenodeath as Greg.
Finish Zenodeath as Wolfgang.
Finish Zenodeath as Amelia
Shooting games will never die.
Destroyed the ?????
Survive the first wave.
Blow up the space station.
Descend to the Alien planet!
Fight your way through the capital.
Get through the military checkpoint.
Access the elevator leading to...
Finish off an old rival, again.
Destroy up the titan guarding the entrance to the gateway.
Put an end to this madness, once for all.