Steel Diver: Sub Wars

Steel Diver: Sub Wars is a first-person submarine simulation game that was developed by Nintendo EAD Group No. 5 and Vitei and published by Nintendo on February 13, 2014. It was released for free exclusively for the Nintendo 3DS via the Nintendo eShop. A paid version can be purchased to unlock features.

In June 2013, it was announced that Nintendo is working on their first free-to-play game, which would be based on Steel Diver, to be released by March 2014. This was ultimately revealed to be titled Steel Diver: Sub Wars during the Nintendo Direct on February 13, 2014, which released after the event for the Nintendo 3DS. Sub Wars is a first-person game featuring a free-to-play online multiplayer mode and two levels of the single player campaign, with additional features and missions available to the paid version.