Power-up Codes

Hint 1 of 10:

SHOOTME: Bulletproof Armor.

Hint 2 of 10:

BURNME: Asbestor Armor.

Hint 3 of 10:

CHOJIN (or /WWW): Woundless with Weapons (Invincibility, with all weapons. 
Cycle through weapons with Insert key).

Hint 4 of 10:

TOOSAD: Temporary God Mode.