Aye, recently had one on Kotaku as well. Just have to look at the art style and it's undeniable, not to mention the grunt in both being the "Space Marine".
Must say I get the impression you're just not interested in the story though. For example, the reason you're after these artifacts is because Tychus wants too. Raynor owes him one, so goes along in it. The clash with the Protoss was a different "clan" or something.
Sums it up pretty well:
http://kotaku.com/5598410/starcraft-...er-impressions
Though you need to take care which units you build. Can't just churn out a horde of Marines and expect to win every fight.