Cheat Mode
Enter the following codes at the "Cheats" menu:
cash - Acquire 1 million DNA cash.
hard - AI does 2x damage and player does 1/2 damage.
levels - Unlocks all levels.
classic - Unlock Fourarms alien form.
energy - Energy meter regenerates.
health - Life meter regenerates.
primus - Unlock Rath alien form.
upgrade - Upgrade every alien form to max.