At the time of its release, few games were available to download (via game cards purchased at retailers for directly from the PlayStationStore,) but Sony has committed to releasing future games on UMD as well as in the PlayStation Store.
GameFly has also added UMD movies for the PSP to their lineup, another rarity in the online video game rental world.But renting video games from GameFly does have one drawback: shipping times.
Since the PSP Go does not have a UMD drive like its larger PSP cousin, the question arises as to how (and if) the user will be able to play UMD-based games like Lumines.
Fumbling through all of those UMD cartridges can be a bit of a hassle, so wouldn't it be easier if you could just download games directly to your PlayStation Portable?
Released late 2004 and early 2005 for Japan and North America respectively, the PSP used a contained disc format called the Universal Media Disc, or UMD.
Retailers have announced they will stop selling UMD discs, the PSP system's format for movies, so expect the film front to dwindle in the months to come.
It's most notable features are its large screen and ability to play games, movies and music from the proprietary UMD disc or memory cards.
They offer PSP UMD movies and games for rent, but sadly they don't include Game Boy Advance or Nintendo DS titles in their inventory.
Without a UMD drive, the PSP Go utilizes 16 GB of internal memory to download and store games wirelessly from the PlayStation Store.
Sony has indicated that a solution is in the works wherein the UMD game can be transferred to the PSP Go's internal memory.