| Achievement | How to unlock
|
|---|
| Castwinvania | Beat all castle levels.
|
| Cave explorer | Beat all cave levels.
|
| Doing things right | Gamepad detected.
|
| Doing things wrong | Gamepad not detected.
|
| For science | Beat all lab levels.
|
| Got gud! | Beat the extra level.
|
| Gotta go fast! | Beat the game in 90 minutes or less.
|
| No floor is too hot for me | Beat all lava levels.
|
| Please don't tell... | Uncover a bovine secret.
|
| The dungeon redemption | Beat all dungeon levels.
|
| Things! | Collect all Things and get something nice.
|
| Twin souls | Die 250 times.
|
| Twinborne | Die 1000 times.
|
| Twins die twice | Die 2000 times.
|
| Very win, much end, wow | Beat the game.
|