Colossus 4.0 (1986)(CDS Software)[b] ROM Download can be obtained free for Acorn Electron on EmuGames.net only. Play emulator game in English for the USA region. Colossus 4.0 is a Acorn Electron ROM that you can download to your computer or play online within your browser. You can also download roms such as Settlement Colossus and Shadow Of The Colossus that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.