Sci-Fi

Alien Adoption Agency
Roleplaying game where players adopt an alien and use it to explore, amass wealth, and take on other aliens in mortal battle.
http://www.web-docent.com/

Alien Training Center
Roleplaying game where roleplayers battle with aliens.
http://www.geocities.com/aleintrainingcenter/index.html

Illumia RPG
A single-player graphical fantasy adventure, including monsters, people, and treasure. With information about the game, FAQ, and forum.
http://www.illumia-rpg.com/