Metal Gear Acid

					
Jehuty card
Enter "JEHUTY" as a password to get a card featuring Jehuty from Zone Of The Enders. This card will destroy all equipment and equipment level-ups in the current room.
Karen card
Enter "KAREN" as a password to get a card featuring Karen from Policenauts.
Mika card
Enter "MIKA" as a password to get a card featuring Mika from Snatcher.
Xmeight
Gives you card 199
Sabrage
Gives you card 200
Nomel
Gives you card 201
Elyts
Gives you Card 202
Maeb
Gives you Card 203
Viper card
Enter "VIPER" as a password to get a card featuring Black Arts Viper from Metal Gear Solid on the Game Boy Color.
XM8 card
Enter "XMEIGHT" as a password to get a weapon card with 50 attack, 60 hit, 5.56mm bullets, 6 shots, 70 reaction, move 6 spaces, knockback, and burn.
Bikini model clip
Enter "ELYTS", "SABRAGE", "NOMEL", or "MAEB" as a password to see clips featuring Japanese bikini models. Note: These will cause Snake to get a nosebleed, but has no effect on Teliko.
Multiplayer with Wi-fi
Once you complete Stage 6, the Residential Area, Teliko has joined the mission. If you go to the options during the intermission menu, Link Battle is now available. You can link two PSPs through AD-hoc, and go head to head while controlling Snake and Teliko.