Electronics maker Sony is hoping to push the borders of its gaming ecosystem outwards by opening up for developers. No official launch date has been announced just yet, but a beta version of the PlayStation Suite SDK will be offered to select developers in the U.S, Japan and Korea. It leverages C# and can be run on Windows XP and 7.

Sony wants to develop the kit further before rolling it out into general availability, hoping to lure in developers that are interesting to get their games offered for users of Sony’s popular gaming devices. These will include its PlayStation Certified products as well as the upcoming PlayStation Vita.

“The resulting games will run on the upcoming PlayStation Vita — a handheld gaming device that will go on sale in December in Japan–and PlayStation Certified products, which include Sony Ericsson’s Xperia Play smartphone and Sony’s Tablet S and P. “

Accepting that mobile gamers represent a bigger and bigger chunk of the portable gaming market is becoming increasingly important for Sony and other players in the industry. A fresh Flarry report confirmed that Android and iOS gamers account for 58 percent of the market now, compared to Sony PSD’s percent and Nintendo DS’s 36 percent.  The latter in particular has been hit hard by this growing trend, considering that the disappointing sales of the Nintendo 3DS handheld console.

Nintendo has been lagging behind for some time now based on its earnings in the past few quarters, but some of its bigger competitors managed to maintain their pace. Among them are Sony and Microsoft, which is trying to flesh out its gaming platform.

Alongside the new Bing for Mobile, the software vendor has been working on making the Xbox 360 a personal cloud entertainment platform that happen to integrate Windows Phone 7.5 devices.