Xbox Live is in full on Summer of Arcade mode and that means that all the focus is on the promotion's first offering, Tony Hawk's Pro Skater HD.
The game is getting some seriously good word of mouth (our own review here on dd is incoming) so maybe it's not a terrible thing that your attention isn't split up into too many places. Which is not to say that there aren't there things to download... some of them free.
Take Mass Effect 3: Earth for example. This multiplayer pack for the action/RPG figures into the game by adding new weapons, character types, and gear aside from the new London, Rio, and Vancouver maps. It's a pretty generous offering considering it's free for all. And they stayed out of the 'destroyed New York' trap- three cheers for that too.
Also free this week is Kinect Mars Rover Landing. This little Fun Labs title lets players mess with NASA's newest Mars rover and storm the landscape of the red planet themselves well before the actual rover touches down. Kinda neat.
- Tony Hawk's Pro Skater HD - 1200mspts -- Take one part THPS, one part THPS2 (and a few choice pieces from a bunch more games in the series) and shake vigorously. Add 'HD' paint liberally.
- Dungeon Fighter LIVE: Fall of Hendon Myre - 800mspts -- Classic side-scrolling 2D action with up to 4 players- online or off.
- Kinect Mars Rover Landing - free (in Kinect Fun Labs) -- Screw around with a virtual version of NASA's Mars Rover Curiosity before she lands on our neighboring world August 6th.
- Mass Effect 3: Earth - free -- Expand the galactic war on the Terran front with this free multiplayer update.