Multiplayer is buggy to no end.

[Paulie]

same as the title states, every time I join my friend, some new bug happens. Example (Not being able to leave Co-Op) and even the esc key not working.

[Petronixman]

Same thing. Trying to play with friend, but focus button not work, and then also block and escape button, a after all of that I Can't even punch anybody, but all enemy can punch me. So sad, that such a good game have problems like that after more then 6 month from release.

[Paulie]

imho they should have kept it on the source engine.

[Hoboparty]

Yep, I'm done. All of my progress is gone because of some bizarre series of crashes when I was trying to join a game. Even when it did work, I had to constantly quit and rejoin when my character would freeze or the controls would stop working.