How do we know? It's all thanks to a custom Sega Genesis cartridge. IGN received a Sonic the Hedgehog 3 film mailer this week that includes a Sega Genesis cartridge that's actually playable.

But for SEGA Genesis (or Mega Drive as it was known ... At this point [Andrew] only has a single “cartridge” for the system, so he simply drops the tags into the cartridge slot of the console ...

This ROM hack comes as an IPS patch that can be applied to a legitimate dump of the user’s Sega Genesis or Mega Drive cartridge. The site hosting the Mortal Kombat Arcade Edition patch features ...

Anyone that grew up in the early 90's and had a Sega remembers how big of a deal ... you could get the Knuckles expansion cartridge and then when you stick both games together, you got to go ...

the Sega CD boasted superior audio quality due to its CD format, offering an experience that was a significant departure from the MIDI sounds of traditional gaming cartridges. Updated January 9 ...

The Game Gear was Sega's brief entry into the handheld market ... It had extra features, such as a cartridge expansion to play Master System games, a TV tuner that turned it into a mini TV ...

First announced at CES four years ago, My Arcade’s Super Retro Champ was a chunky handheld that could play classic 16-bit titles using original Sega Genesis and Super Nintendo cartridges.