I have written a bunch of games, all in Pascal. Most are old now, but I am still working on games and try to find the time to update these. Most are for classic MacOS, some also come in OSX versions.

http://www.lysator.liu.se/~ingemar/games/

Solitaire House, multi-game solitaire, quite successful.
Ingemar's Skiing Game, popular party game.
Bikaka, hexagonal Tetris.
Christmas jigsaw, long-running jigsaw game, updated every Christmas for over a decade with new pictures and shapes.
Mac?Ñggaschack, simple but good-looking game slightly related to tic-tac-toe

MacSokoban, Sokoban for the Mac
Bachman, variation on Pac-Man
Slime Invaders, variation on Space Invaders
Hexmines, hexagonal Mines game
Fia med knuff, a Ludo game
Bert, a Q-Bert variant

eFinans, original game written as PR for a bank. Originally written in Think Pascal (Mac) and FPC (PC), but sadly had to be ported to C because the FPC graphics library couldn't cut it at the time.
Smack-a-Skunk, whack-a-mole with a twist
Classic Daleks, the Daleks/robots game.
Retro Engine, a collection of oldies

Some of these games were shareware, some freeware. Most were written in Think Pascal, using Metrowerks Pascal for PPC ports. (Nowadays I use FPC and love it.)