Shadowgrounds

Shadowgrounds is a shoot 'em up for Microsoft Windows, developed by Frozenbyte. It was released on November 11, 2005 in stores in Finland and Germany, and in Spring 2006 in the rest of Europe and North America. As well as being available through retail stores, the game began being distributed on Valve Software's Steam on May 8, 2006. The game is also available on Gametap as of January 31, 2008. A sequel, Shadowgrounds Survivor, was released in 2007. The game was later ported by Linux Game Publishing, with the Linux version being released on September 16, 2009.