Here is the full list of all 17 Tower Fortress achievements.
Do 10 combo
Beat Spider King
Beat Wizard Lord
Beat Pod Master
Beat Goo God
Destroy the emitter
Do 25 combo
Do 50 combo
Do 100 combo
Unlock 3 suits
Unlock 8 suits
Unlock 15 suits
Unlock all suits
Beat the game in 15 minutes
Beat a level without getting hit
Beat an area without getting hit
Beat a level without killing an enemy