RUSTY HEARTS -ラスティハーツ- 公式サイト
Made by Stairway (still) published by none other than SEGA (
Requirements are to have a sega account, live in japan (not sure yet about other countries being ip blocked).
Closed beta from 17 to 29th october, with 10k people allowed to play.
I find that the character artworks are ... creepy o_O
I prefer the korean ones D=