While playing a game, press [F10], then type one of the following codes to activate the corresponding cheat function. Note: All codes work with the original, unpatched game. However, some codes are disabled in the patched versions of the game.

Note 1: Works in patched versions.

Note 2: This code may kill one or multiple nearby enemies. Repeat the code to kill any surviving enemies. The "headofhorrors" code may need to be enabled before this code works.

Note 3: "Buy Fly!" message in original game, "Quit Cheating" message and zero health in patched versions.