I like this game very much. The characters were what you would expect to be in the Warhammer universe (except for that one Space Marine that followed the rules to the letter). Great graphics and detail to the environment, but I was really hoping to go to another planet and not just be stuck on the one. Plus, the game just had you going back and forth. "Go to the Manufactorum! Go to the lab! Go back to the Manufactorum! Fight to the Tower!" That kinda irritated me.
Fighting was solid. The support NPCs (except for the non-SM guards and their little laser guns) actually did damage and helped you out when you weren't going solo. Weapons were amazing and you had to make almost every shot count for you to actually live in a long battle (because executions wouldn't keep you up forever and just rushing in all the time was a bad idea).
Multiplayer isn't too bad, just wish there was a little bit more diversity in the way of maps and a few bigger ones, too. The classes for multiplayer are awesome, but some of the guns are very over-powered (Plasma gun, anyone?).
Overall, I was very satisfied. I wish I could have gone somewhere else other than Ajakis, like back to Terra or Luna, and maybe met up with other Space Marine chapters, but I'm not complaining too much. I had fun.
Single Player - Fun, Gears of War type gaming, ie 3rd person view, bloody melee executions, fast pace. I liked the story, but it seemed entirely too short. I've actually known a few individuals who played the Warhammer 40K table top game so I had high expectations I guess, and for me it just didn't quite deliver in the end.
Multi Player - I never was able to even get into a real MP match due to w/e bug the game shipped with that crippled the PS3 MP experience. However I did play a MP game by myself in a private match and was able to make it to level 2 LOL. Also, this is another one of those "Elite Pass" games where you have to have bought the game new to get online for free or buy a $10 pass, however you can play for free until level 6, assuming you can find a match.
More on the MP bug, I did read on the official forum board for the game the devs had a patch ready to go to fix it but i waited a little over a week after i read that and never saw the patch, so in the end i sent it back. Gamefly, i would suggest making a nice drink coaster out of this title or something else because it doesn't make a good game as it is currently unless you are just a Wahammer 40K fanatic, but I would imagine even they would be dissapointed.