If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
3 super classic FPS games : Doom Hexen and HEretic all slapped together in one awesome shoot 'em up flash game. Sweetness!
WASD keys to move.
Left and right arrow keys to turn.
Space bar to fire.
R to use.
Shift to run.
'[' and ']' for inventory.
Enter key to use inventory.
Q to jump.
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