Achieved | Achievement | % of players | Unlock date |
|---|---|---|---|
 | Insanity from the beginning The tree falls! | 45.45% | |
 | Weapon Master Unlock all combos | 40.54% | |
 | It's All Your Fault Die in co-op mode | 36.85% | |
 | Brainiac Solve all puzzles | 28.25% | |
 | Helping Hand Kill 20 enemies in co-op mode | 28.25% | |
 | It's Cold in Hell Kill 50 frozen enemies | 23.34% | |
 | I'm All Alone Did you read the text at the very end of the game? | 17.2% | |
 | I Hate Crystals Smash all crystals | 13.51% | |
 | Greatest Show in the World Turn off the last TV set | 12.28% | |
 | Not Right Now, Stan Chop down the tree | 11.06% | |
 | New Adventurate Take a trip with Pam | 11.06% | |
 | I Skipped Everything Congratulations, you skipped the story | 9.83% | |
 | Invincible. Arena completed. | 9.83% | |
 | MWA-HA-HA! Do you know what insanity is? | 9.83% | |
 | Mental Genocide Kill everyone | 9.83% | |
 | Brothers in Arms Beat all bosses in co-op mode | 9.83% |