First up, A.C.R.O.N.Y.M. Games' Rocketmen: Axis of Evil (PS3, X360) is now available for download. The shooter-RPG hybrid supports up to four local or online players, and contains three different character classes and three different playable races. The game, which is already available on the Xbox Live Marketplace, is priced at $9.99.

This week also sees the release of new Guitar Hero III: Legends of Rock content. Up now for download is the Modern Metal Track Pack, which includes "Almost Easy" by Avenged Sevenfold, "The Arsonist" by Thrice, and "Hole in the Earth" by the Deftones. The pack, which is not available for individual sale, will run you $6.25.

As always, the latest Rock Band tracks has also been added with this week's Grateful Dead pack. Deadheads can look forward to "Casey Jones," "Sugar Magnolia," "Truckin'," "Franklin's Tower," "I Need a Miracle," and "China Cat Sunflower", all of which are master recordings. The songs are available individually for $1.99 a piece, or as a pack for $9.99.

Finally, the previously announced port of thatgamecompany's flOw on the PSP has been released on the PlayStation Store for the PC. Described by Shacknews' own Chris Faylor as a "calming life simulator", flOw for the PSP is priced at $9.99.