Today, Mugen Souls got released on Steam. The game is a turn based JRPG with free roaming through different worlds. Current special release discount 40% off price is $11.99 or ¥1447.49 until October 9. For more details, check out the store page. Here's a trailer.
Official Website (EN): http://www.nisamerica.com/games/mugensouls/
Official Website (JP): http://www.compileheart.com/mugen/top.html