Play 20 em 1 emulator game online in the highest quality available. 20 em 1 is a Sega Master System game that you can enjoy on Play Emulator. This Sega Master game is the US English version that works in all modern web browsers without downloading. 20 em 1 is part of the Arcade Games you can play here. PlayEmulator has many online retro games available including related games like Pokemon Platinum Version, Pokemon Mega Emerald X & Y, and Pokemon Red.