I've discovered some really cool stuff by pressing random buttons in Gates of Hell: a bunch of cheat keys!
1: Cavemen become new monsters which look like the Spelunker.
2: Spawns a bomb cannon
3: Spawns ninja stars
7: Spawns a sniper gun
8: Bats, snakes, mantraps, and pirhanas turn into weird yellow versions of themselves with different powers
0: Unarmed cavemen become snipers. This can actually resurrect cavemen.
F10: All enemies' sprites are replaced with question marks
Backspace: Takes you to a weird testing room with glitchy scrolling and no music.
P: Spear traps' eyes become blue flames, and their tops behave like arrow traps with a delay. They can only shoot to the left and under some conditions can shoot through walls.
W: Cultists gain bomb cannons.
Nooo All my debug powers found out!
btw 8 is for the hidden golden city mode I never finshed where every level would be a city of cold level with golden mosnters
f10 was... for a confusen effect so you didn't know what was what, to be used with a all bad guys spawn on all levels effect.
also w is fun