We made a Realtime Online Multiplayer Boxing game named Classic Boxing.
This game is a tribute to the old Boxing game from Activision on Atari 2600.
It's our first multiplayer game and have we learned alot from it.
We published it at Konregate, Clay.io, Newgrounds, Game Jolt and our own Website.
Links to the Gamesites:
Game Joilt: gamejolt.com/games/sports/classic-boxing/28114
Honestly there are not as many players. Its hard for a pure Multiplayer game to get regular players when there is no player to play with ^^;;