F1 toggleShowHelp();

SPACE showAllHud(-1);

CTRL SHIFT F2 toggleDoCopyRight();
SHIFT F2 toggleBackCooperativeToSinglePlayerModes
CTRL F1 toggleWideScreen
F2 toggleCooperativeToSinglePlayerModes

CTRL H toggleSplitScreenDirection();

CTRL S toggleSound();
CTRL M toggleMusic();

F9 restartLevel();
F8 goToLastCheckPoint(-1);

