Angel Beats! Operation Wars

About

Angel Beats! Operation Wars was a social puzzle game based on the Angel Beats! franchise that allowed players to collect cards with illustrations of various characters from Angel Beats! and fight the Shadows alongside the Shinda Sekai Sensen.

On March 10th, 2016. it was announced that the game's service would be terminated on May 10th, 2016.

Source: IGDB