Swamp Thing (Proto) ROM Download can be obtained free for Sega Genesis on EmuGames.net only. Play emulator game in English for the USA region. Swamp Thing is a Sega ROM that you can download to your computer or play online within your browser. You can also download roms such as Scooby-Doo And The Spooky Swamp and Swamp Thing that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.