Twice I've tried to play this and both times it has locked up. It doesn't crash, it keeps running but no input whatsoever seems to work. Apart from the chat key it seems, but you can't type anything. First time, this happened to the friend I was playing with, forcing him to terminate the game. Second time was in single player at the very end of the first story level and I had to shut the game down using the activity manager.
I would include a crash log, if there was one. The error log doesn't seem to contain anything of use. All it contains is 1284790 lines worth of:
ERROR in
action number 1
of Draw Event
for object obj_skillsmenu_swordsman:
Error in code at line 3:
at position 22: Unknown variable score_bg
Alternatively the same at position 5.
Also, no key to go backwards in in-game menus? Seriously?