The Paradox Interactive beta signup page offers applications to closed beta testing of Sengoku, the upcoming grand strategy game where the player assumes the role of an illustrious samurai family during a civil war in 15th century Japan. Beta applications are being accepted until May 23rd, and those who are accepted will be notified by May 25th. The game is due for release on September 13. For more about the game, here's a video developer diary and here's the game's announcement trailer.