| Achievement | How to unlock
|
|---|
| Brainiac (40 points) | Solve all puzzles.
|
| Brothers in Arms (80 points) | Beat all bosses in co-op mode.
|
| Greatest Show in the World (90 points) | Turn off the last TV set.
|
| Helping Hand (40 points) | Kill 20 enemies in co-op mode.
|
| I Hate Crystals (70 points) | Smash all crystals.
|
| I Skipped Everything (40 points) | Congratulations, you skipped the story.
|
| I'm All Alone (90 points) | Did you read the text at the very end of the game?
|
| Insanity from the beginning (30 points) | The tree falls!
|
| Invincible. (90 points) | Arena completed.
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| It's All Your Fault (30 points) | Die in co-op mode.
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| It's Cold in Hell (50 points) | Kill 50 frozen enemies.
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| Mental Genocide (100 points) | Kill everyone.
|
| MWA-HA-HA! (90 points) | Do you know what insanity is?
|
| New Adventurate (90 points) | Take a trip with Pam.
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| Not Right Now, Stan (30 points) | Chop down the tree.
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| Weapon Master (40 points) | Unlock all combos.
|