The Binding of Isaac is probably one of the most influential games in the roguelike space. While it wasn't the first to adopt the stylings and progression systems of iconic 1980 dungeon crawler Rogue, it certainly did a lot to popularize the format, helping spawn a surge in randomized run-based games. Now the addition of online multiplayer means you'll finally be able to play The Binding of Isaac Repentance co-op with your friends over the internet.
RELATED LINKS:
The Binding of Isaac: Repentance draws over 60,000 concurrent players on Steam
The Binding of Isaac: Repentance is out now
The Binding of Isaac: Repentance adds popular fan mod, Antibirth