Which Space Hulk are you talking about? The Old Turn Based? The new Turn Based (Ascension)? Or the newest FPS Deathwing?
Space Hulk: Deathwing is fucking awesome.
Space Marine was fucking awesome too, at the time. The biggest downfall was the small player base, but the Multiplayer was a blast while it lasted. I loved the multiplayer actually. But I am a total Space Marine nerd & fanboy so whatever.
I really liked the way they integrated 3rd person, 1st person and instantaneous melee. It was very well done. I also loved the customization the Multiplayer offered. You could do almost anything to your armour.
They really designed a beautiful game there, but the player base, again, was just too small.
Further to that, the really stupid move they made based on greed, was to alienate the "casual-fans" playerbase from the hardcore 40K nerds by charging for the map pack DLC. The player base was so small, and then they released an expansion and very few people bought it. The number of people who bought it was so low that it was impossible to find a game. The DLC included four new maps.
I remember, I literally got to play two games; both on the same map. To this day I never even got to see the other three maps or what they looked like, because the game would never load. It would get stuck on a perpetual searching screen. It was a drag for the fans and a stupid move by the company. They should have included the DLC Maps for free, or put a solo mode in there where you could play against bots at least.
Now they had hardcore fans that paid money for a DLC that couldn't play any of the DLC content, and were forced to begrudgingly go back and play nothing but vanilla content, so they were pissed.