Eye surgery
Destroy level-1 boss
Heart attack
Destroy level-2 boss
Out of misery
Destroy level-3 miniboss
Insect control
Destroy level-3 boss
Cyborg for dinner
Destroy level-4 miniboss
Cure for arachnophobes
Destroy level-4 boss
Intestinator
Destroy level-5 miniboss
Disturbed symbiosis
Destroy level-5 boss
Empty shell
Destroy level-6 boss
Survival of the fittest
Destroy level-7 boss
Total devastation
Destroy everything
Savior of the universe
Complete the game on 'Easy' difficulty setting
Hero for ages
Complete the game on 'Normal' difficulty setting
Inhuman
Complete the game on 'Hard' difficulty setting
Godlike
Complete the game on any difficulty setting with no deaths
Addicted to destruction
Complete the game on any difficulty setting 2 times in a row
Gunslinger
Complete the game on any difficulty setting using only alternate firing
Ultra Ultimate Super Cyborg
Complete the game on 'Hard' difficulty setting with no deaths
The ultimate team
Complete the game on any difficulty setting in coop mode
Bodyguard
Complete the game on any difficulty setting in coop mode without any single shot and deaths from player 2
Super deadman
Die 100 times
Explorer
Find all hidden power-ups
Life stealer
Steal a life while playing coop mode
Real power
Use maximum charged alternate fire for all weapons
Award for effort
Earn an extra life
Devil's colors
-?-
Collector
Collect all power-ups in the game (including all hidden power-ups)
Golden Cyborg
Earn 500000 points
Flesh and bones
-?-
Freedom to crawlers
-?-
Band of followers
Gather 10 quadropods on the screen on level 6
Heavy lifting
-?-
Squashed
-?-
Sharpshooter
Kill 10 enemies with one shot
Good listener
Listen all tracks in music test menu (Complete the game to unlock it)