40k is basically a pastiche of sci-fi and fantasy cliches (and I mean that lovingly), so you shouldn't have a problem following it.

If you liked the demo, I say go for it - the focus of the game is on combat, not the story. As long as you're not actually repelled by the universe and the fiction, you should be able to follow along.

A lot of people only got into WH40k because of the strategy games, don't see why Space Marine couldn't do the same.

If you find something in the game you don't get then there's always Lexicanum which will explain anything.

Go pick up Horus Rising, it's a great start if you want to get into the fiction (I just started reading last month). Also, this game is awesome either way.

You are a big, British, space man with a gun and chainsaw. They are a green, animalistic horde. That's all you really need to know. Have fun.

I think I'm going to buy it tomorrow when it comes out, thanks guys.

I just beat it, it's a good game.

40k is basically a pastiche of sci-fi and fantasy cliches (and I mean that lovingly), so you shouldn't have a problem following it.