Sky Force is a vertically scrolling shoot 'em up video game series created by the Polish video game developer Infinite Dreams Inc. The gameplay is reminiscent of Capcom's 19XX series and Seibu Kaihatsu's Raiden series, featuring a weapon upgrade system and large end of stage bosses. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.