The first mission of the "DLC" The Shock, Steam Version, you defeat the tentacle boss, get to the second part where you're supposed to kill a second boss or something after about 3-5 seconds you crash to your desktop with a big WTF is going on?

All other Missions / Game-Play seems fine, someone likely forgot to put the , or ; in the script.

The second problem is there should be a quick match-making so you can find a queue for co-op fast, and perhaps even a PVP mode (This one isn't a bug.)