Jordan Neidlinger released a Tic Tac Toe game for the PSP. Release notes:
Coding Tic-Tac-Toe is my first project on the PSP, and as such I chose it because of its simplicity. Coding the game honed by somewhat rusty coding skills, and gave me knowledge and know how with PSP-homebrew’s. I know its not a fancy game, nor is it anything special, but I had fun making it, so I thought I might as well release it!
Note: The AI in this game is almost non-existence RIGHT NOW. I only put in the simplest of computer thinking, if you would even call it that. If you cant win everytime, SHAMEON YOU! (just kidding).
AEP-Emu (DE/EN)
DMG Page (DE)
EmuBit.pl (PL)
HomebrewWelt (DE)
Indie Retro News (EN)
NintendoMax (FR)
PlayerAdvance (FR)
Retroguru (EN)