XEvil

XEvil cheat codes: 
While an enemy is shooting at you, hit him with the Soul-Swapper.
After switching bodies, his own bullets will kill him.

Drop a Transmogifier on an Alien or some other tough enemy.
It will probably turn him into something easier to kill.

Trigger a Bomb, but don't drop it. Then soul-swap an enemy.
He will find himself holding the hot-potato when it goes off.

Activate Doppelgangers and Dogs as living shields when being pursued
by a really nasty enemy, say a FireDemon.

Drop drugs on your enemies until they die from overdose.

Use a Transmogifier to change bodies when missiles are tracking you.
They will lose the lock-on and fly into a wall.