Metal Gear Acid has shipped to retail stores nationwide, according to a press release from Konami. The newest addition to the Metal Gear franchise combines stealth action with new emphasis on tactical turn-based strategy.

“Creating a Metal Gear game for the PSP handheld system has allowed us to expand the franchise into a new direction,” said Jason Enos, product manager, Konami Digital Entertainment – America. “By making MGA a turn-based game, we were able to concentrate on the series’ crucial elements – stealth and strategy – and make an entirely original experience that is accessible to gamers on the move.”

MGA is a new adventure in which Snake must infiltrate a remote base and uncover the secrets of a mysterious research project in order to save the lives of hundreds of people held hostage. The game is available exclusively for the PSP for $39.99 and rated "M" for Mature by the ESRB.