Here is the full list of all 30 Abomination Tower achievements.
500 deaths
Unlocked 'Flappy ears'
200 deaths
A century!
Level Five Complete
Unlocked 'Bucket'
Level Four Complete
50 deaths!
Level Three Complete
Unlocked 'Air head'
Unlocked 'Speed demon'
Level Two Complete
Level One Complete
Unlocked 'Save my butt'
Level Six Complete
Level Seven Complete
Level Eight Complete
Level 9 Complete
Level 10 Complete
All the way back down
Unlocked 'Biter'
Unlocked 'All seeing'
Unlocked 'Spiker'
Unlocked 'Golden ego'
Unlocked 'Already dead'
1000 deaths
Finished Hardcore mode!
Finished Hard Mode!
Finished Normal Mode!
Finished Easy Mode!