Just finished, it is a very,very good adventure, very unique, hold its own very good, mainly because the story (which wasn't what i expected first) unfolds in a very interesting way. Encountered a few crashes here and there but nothing major, i went and added some reg entries regarding the directdraw and this game and then it worked smoothly.
As of today i've played through the game several times and loved it each single time. The sound track is composed by Trent Reznor (Nine Inch Nails) and it adds to the atmosphere tremendously. There are tons of custom made maps/campaigns to be played and many of them are really top quality. I have two ways to play this game, one is with the quake HD pack found on moddb in single player and the other is with my friends in CO OP on lan* using quakespasm (really light engine that can run on a 4 year old netbook) and it is absolutely a blast. *you can use a vpn i believe or something like hamachi, not sure about just creating a server but i'd assume it works, just i never do it.
