Black Jack
http://andru.sonoma.edu/~luvisi/
Kewl Checkers
http://user.mc.net/~twagner/kewlcheckers.htm
Web Libs
http://awsd.com/scripts/weblibs/index.shtml
CGI Chess
http://www.watson-net.com/free/perl/s_chess.asp
Hangman
http://www.albedo.net/pub/cgi-games.html