...is a glorious, rat-stomping Horde Mode FPS. It's like Left 4 Dead fell into the Warhammer Fantasy universe... and it really works. Good graphics, great gameplay. Very nice, stompy HTH combat action; you will really feel like you've just waded through a million Skaven at the end of a fight against a mob.
It can get brutally hard with a lot of human players, even on "Easy", but it's not too bad when you're playing with just bots on a private session. And yes, the bots are reasonably smart.
The only fly in the ointment atm is that progression of characters is pretty lame; your characters are their gear, but gear is randomly given at the end of missions and it's not particularly well-thought-out, in terms of allowing character growth and allowing people a smooth transition to harder levels of difficulty. This will probably get addressed.
That, and you need a fairly uber PC to run this one; my current gaming box is not a beast by current standards, but isn't bad; I can only run it well with most of the settings quite low atm, because of the CPU load of all of the bots.
Anyhow, lots of fun; I haven't had this much fun with a FPS since the latest DOOM.