TheSmartAss.info's suite of Java emulators allows smooth, in-browser playback of literally thousands of old-school video games: 517 Atari titles, 148 for DOS, 636 Game Boy games (and 410 for Game Boy Color), 2,019 (!) NES titles, 238 GameGear games, 802 Sega Genesis titles, and 284 for the Sega Master System. Highlights include Space Invaders, Frogger, Galaga, Pitfall!, Super Mario Bros., The Legend of Zelda, Metroid, SimCity, Zero Wing, Duke Nukem, Sonic the Hedgehog, Aladdin, Earthworm Jim, Pokemon, and Metal Gear Solid. Use the search function to find your favorites! You can also register an account to save games on emulators that support it. Make sure to check the purple bar below each game for control info and links to alternate emulators in case the default one is buggy or slow.
posted by Rhaomi on Nov 30, 2009 - 54 comments

A few years ago an old NES game called Sunman was discovered. Developed by a company called Sunsoft, it was clearly a repurposed Superman game, with the Man of Steel seemingly having been replaced at some point during the games development by a generic new superhero. This was likely done to avoid expensive licensing costs for a game that was due to be released around the end of the active lifespan for the NES (and would probably not sell well as a result) but this was purely speculation. Until now. For now a build of the original Superman game by Sunsoft has been found and you can download it for free here. [more inside]
posted by Effigy2000 on Apr 28, 2009 - 29 comments

Thanks to the LUA scripting support in NES emulator FCEUX, you can do things like drag and drop enemies and powerups, alter gravity, give mario a jetpack, or make him shoot magic missiles. Super Mario Brothers not your thing? Perhaps you'd rather just have it play Pinball for you.
posted by Pope Guilty on Mar 20, 2009 - 14 comments

Mario Adventure - SMB3 hacked into an entirely new high-quality game
posted by Protocols of the Elders of Awesome on Feb 17, 2006 - 20 comments