Unsurprisingly, modern homebrew appears a bit more sophisticated than the offical releases: http://www.consolecity.com/games/action-game_info/game_id-29406.htm

Unsurprisingly, modern homebrew appears a bit more sophisticated than the offical releases: http://www.consolecity.com/games/action-game_info/game_id-29406.html http://www.consolecity.com/games/action-game_info/game_id-29... edit: some neat tech demos on Archive.org, too: https://archive.org/details/International_Karate_Demo https://archive.org/details/International_Karate_Demo