Play MASTER Games Online in high quality. All the retro Sega Master System games for the retro gamer, there are many MASTER games in the collection. Start playing favorite MASTER emulator games now and use the menu on the right to browse game collections. Feel free to comment on and upvote the best MASTER games you enjoyed playing! Begin by playing popular Sega Master System titles like Sonic The Hedgehog, Alex Kidd in Miracle World, Sonic Chaos and Sonic The Hedgehog 2.