Here is the full list of all 11 Chronoclysm achievements.
Exceed all challenges and obtain all Survival trophies
Rebound one magic missile ten times or more.
Use emergency chicken and win.
Eliminate 6 enemies or more with one bomb.
Boot up and play Chronoclysm more than once.
Have 100 or more time phantoms total on startup.
Destroy Glorps, The Banshee and Orzez without taking damage. (Barrier Barrel OK)
Beat a challenge in one round.
Eliminate an enemy with every combination of magic missile.
Purchase every item once.