The 3rd Birthday is an action-adventure game for PlayStation Portable from Square Enix. It follows Aya Brea in Manhattan as she uses experimental Overdive technology against the creatures known as the Twisted.

• Cleaned, tested, and guaranteed to play. Authentic cartridge.
• Real-time, over-the-shoulder combat focuses on mobile shooting and battlefield positioning.
• Overdive allows Aya to instantly shift into the position of an ally during combat.
• Upgrade Aya’s unique powers and customize a wide range of weaponry throughout the game.
• The story centers on traveling to the past to prevent destruction in the present.
• Uses the PSP UMD format with a 384 KB memory save requirement.

The game is built around Aya’s body-switching Overdive mechanic, which separates it from standard handheld action shooters of the PSP era.