Another Super Smash Bros-like game that does it well. It still has to develop a bit more but this game will be a much bigger success down the road.

Intense competitive matches.

Great co-op experience with pretty legit music.

One of my current favorites. The game itself has some issues currently but it is still well worth it in my eyes.

Decent dungeon-crawler with custom community-made maps.

Fun 3v3 basketball with character customization.

Strong competitive game with a decent amount of individual hero customization. Not for the easily offended. :p

If you are looking for a Diablo-like fix then this may be your game.

The online population seems low from the couple times that I tried but it's a fun 2D adventure regardless.

Immersive combat system with the occassional "You shallllllll not passssssss!".