I still don't understand why they used the Ultramarines though, sure there are better models for this, but Ultramarines are probably the lamest chapter I have ever seen. Especially since the movie that proved them being rather docile. What titus said to that other marine that wanted to follow the code I did like however. Although as a Captain he should say it a little bit different. Following the codex is a good thing, but in battle, codex not always works, example is Eliphas and his Black Legion, Cyrus wanted to follow the codex about Chaos tactics, but Eliphas is no ordinary Chaos marine, he kept patrols tight which makes up as counter to Space Marines Codex against the Chaos marines. In that case you sometimes have to improvise.
Titus should have said just that, Codex is fine, but sometimes you have to improvise.
If it was Blood Ravens or Space Wolves, the game would have been a shit ton better.
Still, the game in itself as carnage as it is, is awesome.
I'm loving carnage and it was a long time since Warhammer gave us so much blood. Even though DoW2 was awesome, Chaos Rising didn't give as much fun as the original title, and then Retribution hit lowering the challenge to minimum.