Play Multiplayer Games on Emulator Online. We have the best Multiplayer games online for different retro emulators including GBA, Game Boy, SNES, Nintendo and Sega. There are over 5 online Multiplayer games in our collection. All of the games that you see here are without download, pick any and start playing right away. If you enjoy the game, be sure to vote for it and leave a comment. Multiplayer games that started it all back in the day are now playable free within your browser! Start by playing some of our popular Multiplayer online games like Advance Wars 2 : Black Hole Rising, International Superstar Soccer, Advance Wars and Cartoon Network Block Party.