There's a lot of debate right now whether or not this one is actually accurate.
It's not, it's the NORMAL Venator, it even says so in-game.
You're talking about the commendation for Spartan Ops? The assassination commendation for War Games does unlock the normal armor, but what we're unclear on is what, when or if the Spartan Ops commendation unlocks anything.
Wait, wait, wait. You mean that the preorder bonus for preordering from Best Buy is supposed to be unlockable in game?! THEN WHAT PURPOSE DID PREORDERING SERVE?!
That's what we're not sure about. I've heard that the guides say that all but the unicorn armour that you got with the console addition is unlockable in game but i've also heard that you can't get this armour apart from the pre-order.