The intro cinematic has some nice looking background on the 40K universe.
Your commander will brief you...
... before (literally) throwing you into the trenches.
It's no coincidence that your weapons look like Nerf guns, that's about how much damage they do.
This shot may look like a gimmie but there's only about a 50/50 chance that you'll hit this guy if you pull the trigger now.
You eventually get closer to Space Marines than this statue.
Yes, there's a sniper rifle. There has to be a sniper rifle doesn't there?
Sparing no expense on background decoration, the designers use art from 40K rule books.
Want to be a Space Marine? You'll have to settle for multiplayer (if you can find a game).