| Achievement | How to unlock
|
|---|
| Albert | Albert has been executed.
|
| Baseball | Let's play baseball.
|
| Bonus | Bonus weapon.
|
| Boss | I'm the boss here.
|
| Calvin's alive | Restless mind.
|
| Calvin's dead | Rest In Peace.
|
| CTHULHU | Cthulhu has been slain.
|
| Daredevil | Hoverboard found.
|
| Drowned | Not enough air.
|
| Easy | Piece of cake.
|
| Fish food | Gobbled up.
|
| Flick is Doomed | You're on your own.
|
| Got all endings | Yay!
|
| Handle with care | Bloody box.
|
| Hard | Huh, am I still alive?
|
| Head-on | Got smashed to smithereens.
|
| Hydrophob | Hydrophob is dead.
|
| King of Slugs | The King of Slugs has fallen.
|
| Medium | Everything in moderation.
|
| Mercy | Brotherly Love.
|
| Scrap metal | Robot X01 has been destroyed.
|
| Sky's the limit | Jet pack found.
|
| Superboots | High jump.
|
| Test pilot | Abyss-mal fall.
|
| The collector | All collectables have been found.
|
| The Keeper | The Keeper has been slaughtered.
|
| The Keeper of Underworld | The Keeper of the Underworld has been annihilated.
|
| The Needler | The Needler is neutralized.
|
| The Rat King | The Rat King has been destroyed.
|
| There, I fixed it | Yay!
|
| Tired | Be right back.
|
| Yolo | You only live once.
|