Cheat Menu
Pause the game and press C-Up, C-Down, C-Left, C-Right. Now a cheat option will appear at the bottom of the menu.

Level Select
Enter the cheat menu and immediately press C-Left(2), C-Right(2), C-Down, C-Top. If you entered the code correctly, you will hear the sound of rushing air.

Invincibility
Enter the cheat menu and immediately press C-Left, C-Right, C-Down. If you entered the code correctly, you will hear the sound of rushing air.

Full Health
Enter the cheat menu and immediately press C-Left, C-Up, C-Down(2). If you entered the code correctly, you will hear the sound of rushing air.

Walk Through Walls
Enter the cheat menu and immediately press C-Up(20), C-Down. If you entered the code correctly, you will hear the sound of rushing air.

Kill All Visible Enemies
Enter the cheat menu and immediately press C-Down, C-Up, C-Left(2). If you entered the code correctly, you will hear the sound of rushing air.

All Keys
Enter the cheat menu and immediately press C-Down, C-Up, C-Left, C-Right. If you entered the code correctly, you will hear the sound of rushing air. Now enter the collect menu to activate the code.

All Weapons
Enter the cheat menu and immediately press C-Right, C-Up, C-Down(2). If you entered the code correctly, you will hear the sound of rushing air. Now enter the collect menu to activate the code.

All Artifacts
Enter the cheat menu and immediately press C-Up, C-Right, C-Down, C-Up. If you entered the code correctly, you will hear the sound of rushing air. Now enter the collect menu to activate the code.

All Puzzle Items
Enter the cheat menu and immediately press C-Up, C-Left(3), C-Right, C-Down(2). If you entered the code correctly, you will hear the sound of rushing air. Now enter the collect menu to activate the code.