- 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.

- Karen card
Enter 'KAREN' as a password to get a card featuring Karen from Policenauts.

- Acquireing rare cards
Notice: Save your game before doing this trick. Make sure you have a lot of points to spend, then go to the card shop. Buy all packs in the shop for the rare card you want (for example, Liquid Snake, Genola, Solid Snake, etc.). If you do not obtain any cards you want, go to options then return to the title screen. Reload your game and do the same thing until you get the desired card.

- Bikini models
Enter 'UMEDA' as a password to get a card featuring Japanese model Asaki Yoshida in the North American version of the game. For the Japanese version of the game, enter 'NOMEL' as a password. Notice: This will cause Snake to get a nosebleed, but has no effect on Teliko.


Enter 'KOBE' as a password to get a card featuring Japanese model Kosaka Yuka in the North American version of the game. For the Japanese version of the game, enter 'SABRAGE' as a password. Notice: This will cause Snake to get a nosebleed, but has no effect on Teliko.


Enter 'ROPPONGI' as a password to get a card featuring Japanese model Shibuya Eri in the North American version of the game. For the Japanese version of the game, enter 'MAEB' as a password. Notice: This will cause Snake to get a nosebleed, but has no effect on Teliko.


Enter 'YEBISU' as a password to get a card featuring Japanese model Saitou Yuu in the North American version of the game. For the Japanese version of the game, enter 'ELYTS' as a password. Notice: This will cause Snake to get a nosebleed, but has no effect on Teliko.

- Play as Teliko
Successfully complete the Residential Zone mission to unlock Teliko.

- Viper card
Enter 'VIPER' as a password to get a card featuring Black Arts Viper from Metal Gear Solid on the Game Boy Color.

- Mika card
Enter 'MIKA' as a password to get a card featuring Mika from Snatcher.

- 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.

- Raiden card
Successfully complete the game two times to unlock the Raiden card.

- Link battle option
Successfully complete Stage 06 to unlock the 'Link Battle' selection at the 'Options' menu under the 'Intermission' screen.

- Solid Snake (MG) card
Successfully complete the game to unlock the Solid Snake (MG) card.