Display Spyro the Dragon code:
Press Square, Circle, Square, Circle, Square at the main menu.

Cheat mode (Tomb Raider 3):
Hold R2 and press L1 + X + Square during game play. Lara will be invincible and may move freely throughout the level.

Find a Nikita Launcher (Metal Gear Solid):
On the level that the rescue the Darpa Chief is rescued, ride the elevator up. After reaching the helicopter pad, get all weapons, full life, and all the rations. After everything is full, go through the air vent to the room with the two army tanks. Once again, get all weapons, full life, and all rations in this room. Return through the air vent to the helicopter pad. Enter the truck where the Socom was found the first time to find the Nikita Launcher.