The virus strikes again as I can't even install the game.
I'm totally having someone dick with my PCs.
Incomplete Installation (55)?
I had this problem, my antivirus was causing it and I had to uninstall, but there are lots of other reasons for that error to appear.
And multiplayer is quite awesome, there's DukeMatch, Team DM, Capture the Babe (ctf with babe) and Hail to the King (koth). There are only a few maps, but they don't get repetitive, they only get more fun after you start to remember best weapons' locations. Usable hidden traps is also nice touch. And there will be paid multiplayer DLC.