Major Nelson has detailed this month's scheduled Xbox Live content. This week, Zeno Clash: Ultimate Edition and RayStorm HD will be hitting Arcade. Some more Game Room games will be added tomorrow as well and that content will include Super Breakout, Pitfall!, Megamania, Night Stlaker, Rack 'Em Up, Realsports Volleyball and Basketball.
Next week, Konami's Rocket Knight will be hitting Arcade for 1200 points. You can also nab Tom Clancy's EndWar on May 11. Then on June 2, Snoopy Flying Ace will be out for 800 points.
Several games are getting some new DLC this month too:
Finally, some new Avatar Marketplace content is coming. On Map 6, you can get some Final Fantasy XIII and Game Room gear. Then on May 13, you'll be able to outfit your Avatar with Army of Two and A Kingdom for Keflings pointless digital merchandise.
Coming Soon to the Xbox LIVE Marketplace [MajorNelson]
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