For anyone reading this in the future:
To enable debug mode on the PC version, on the numpad press & hold: NUM LOCK + DIV + MINUS
if u have a tenkeyless keyboard like me, i guess ur just screwed...
Commands:
F2 KEY: Toggles HUD visibility
F3 KEY: Toggle player visibility
F4 KEY: Show player respawner (only used in levels where player can fall off stage)
F5 KEY: Save game to current save state
F6 KEY: Loads game from current save state
F7 KEY and F8 KEY: Change current save state number
T KEY: Makes player invincible
O KEY: Unlocks all special weapons (I think it has to be pressed in a level)
SHIFT + 0-7 KEYS (not numpad): Warp to checkpoints 0 through 7
0-7 KEYS: Equips chips to Slot 1 (1st page of chips)
0-7 KEYS + CTRL: Equips chips to Slot 1 (2st page of chips)
0-7 KEYS + C : Equips chips to Slot 2 (1st page of chips)
0-7 KEYS + C + CTRL: Equips chips to Slot 2 (2st page of chips)