Index Digital Media and GREE are working together on an Etrian Odyssey social game. Etrian Odyssey S: Eternal Champion has over 400 cards with different characters and monsters.
F.O.E.s are in Etrian Odyssey S and you can work with other players to take down these powerful monsters. The goal of Etrian Odyssey S is to explore the Yggdrasil labyrinth and survive. Well, except for Index and GREE. Their goal is to sell virtual items since Etrian Odyssey S is free to play.
Etrian Odyssey S: Eternal Champion will be released at the end of July.