Vita isn't really flying off the shelves. Given the relatively low hardware penetration, the success of Retro City Rampage on Sony's handheld comes as a bit of a surprise. Brian Provinciano, creator and developer of the game, recently went on Twitter to praise the system.

"Indies should definitely jump onto the PS Vita," he advised. "RCR's sold much more on PSN than XBLA and more on PS Vita than even PS3."

But, wasn't the game available as part of the PlayStation Plus Instant Game Collection, you ask? Good question! "This doesn't include PS Plus," he added. "It's SOLD far more on PSN than XBLA. With PS Plus, there are a bajillion more copies out there." Even more surprising: the game sold better on PlayStation Network than it did on Steam. "Steam's done far better than XBLA too, but PSN has still done the best," Provinciano revealed.

The developer credits the dearth of software on Sony's handheld as part of his game's success. "Vita players are hungry for games," he said, calling on other developers to "make them more!" As if that weren't enough praise for Sony's hardware, Provinciano also says that "Vita's been the easiest console platform to develop for, and I've dev'd for just about everything."

Given his game's success on Vita, he's already pledged to make another game for Sony's handheld. "I'll definitely be doing another Vita game," he enthusiastically noted.