Alien 3

Begin the game and press ABYX on controller 2. Press A on controller 1 and a number will appear in the top corner. Re-enter the code on controller 2 and press B or X to increase the number to one of the ones below:

Effect	Code
All codes activated	7
Invincibility	1
Invincibility	3
No damage	2
Unlimited weapons	4
Unlimited weapons and invincibility	5
Unlimited weapons and no damage	6

Effect	Code
Ending	OVERGAME
Level 02	QUESTION
Level 03	MASTERED
Level 04	MOTORWAY
Level 05	CABINETS
Level 06	SQUIRREL

On Controller 2 press A - B - Y - X then enter the following code on Controller 1

A - Invincibility
B - Double Damage Inflicted on Enemies
X - Infinite Ammo

Note: You can do all three of these cheats, but you will have to re-enter the code for Controller 2