Perilous Swamp (1981)(Psion Software - Sinclair Research)[a2][16K] ROM Download can be obtained free for Sinclair ZX81 on EmuGames.net only. Play emulator game in English for the USA region. Perilous Swamp is a Sinclair ZX81 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 Frogger 2 Swampy's Revenge that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.