Earlier this year I sat down to a co-operative game -- of the board-kind -- of Space Hulk. Sufficed to say, I was jumped by the difficulty and slaughtered by genestealers in short order. Since then, I've been looking forward to trying out the multiplayer in the upcoming PC translation, which can now be pre-ordered on Steam, though it appears I'll have to wait an indeterminate time to recreate my punishing, real-world experience.
According to a developer FAQ on the game's forum on Steam, the planned co-operative multiplayer won't be part of the title on release. Instead, it will be added to "brand new designed levels" and pushed out as a "free update". The only time frame provided, unfortunately, is "later".
That said, the game will have head-to-head MP if that's your thing and I'm sure for a lot of people, it is... but not for me. So while the game can be pre-ordered now, I think I'll wait to see how the co-op pans out (if at all, offers cynical me).
A cool feature is the cross-platform multiplayer (the game is being released on Windows, Mac and iPad) and I like that flexibility. It's turn-based, so being on a touch-based device isn't going to be a disadvantage. I'd still like to see how it plays first, though.