I have designed games for both fantasy roleplay (FRP) and electronic gaming systems (ColecoVision, IntelliVision, Atari 2600, etc.). Some examples of FRP games include the original druid rules for D&D, Bunnies and Burrows, Swordbearer, Heroes of Olympus, and scenarios for RuneQuest, Paranoia, and others. I did a few board games, like Intruder, Star Smuggler and Kung Fu 2100. Also programmed some MUDs and MUSHes.
Some video game examples include Super Action Baseball, Super Action Football, Looping, Destructor, Rocky Boxing, Frenzy, and Smurfs Save the Day. I'm not doing any game design today, though. Happily retired, thank you.