Wolfenstein
Wolfenstein on the Xbox360 is a decent game, it's got a fairly lengthy single player, with some enjoyable missions, but is tied together with a somewhat annoying structure.
You receive missions in town by speaking with various groups and then heading out, but unfortunately that just means traversing the same parts of the city with re-spawning bad guys between shorter bouts of fun (the missions themselves). The town really doesn't offer any interesting gameplay after you've gone through it for the third time, so it honestly feels completely unnecessary and I really wonder why it wasn't just given a straight level to level format that other shooters seem to use just fine, as it really just does nothing but annoy me rather then immerse me in the game world.
Anyways, the good news is the missions themselves are a lot of fun, and they're generally differing scenarios that have good tight combat and some fun action sequences. The single player campaign sports some upgradable weapons, magical powers, and a fast pace to keep things interesting.
The multiplayer; I unfortunately had somewhat high hopes for after thoroughly enjoying RTCW's multiplayer on the Xbox. You can tell they used it for inspiration here, but the graphics take a hit, and the tactics of the past Wolfenstein game all seem to have gone by the wayside. The games I've played online so far have for the most part just felt like a random mess. I still managed to have some fun, but if you're expecting to relive the memories of RTCW's multiplayer, well you might have to look elsewhere.
Ultimately, I'd recommend this game to anyone looking for a single player campaign, that can deal with the annoying structure, with the "open world" concept. If your looking for a good multiplayer shooter I'd have to advise steering clear of this title.