Activate the following cheats by entering the corresponding codes at the "Cheats" option:

CHEAT FUNCTION - CHEAT CODE
+1 million DNA - cash
AI does double damage, player does half damage - hard
Energy regeneration - energy
Health regeneration - health
Level select - levels
Rath - primus
Fourarms alien form - classic
All characters - characters
Upgrade everything to maximum - upgrade
You can use ultimate forms anytime, anywhere - Hero Time