Short answers, pulled from the story.
Shin Megami Tensei: Liberation Dx2 is a mobile role-playing game developed and published by Sega for iOS and Android. It is part of Atlus' Shin Megami Tensei series and the broader Megami Tensei franchise. The game follows a player-created character who uses a smartphone app to summon and battle demons.
Dx2 was released in Japan, Taiwan, Hong Kong, and Macau in January 2018, following a short private beta. A public beta launched in July 2018 ahead of the worldwide release.
Dx2 uses the press turn battle system, which originated in Shin Megami Tensei III: Nocturne. Under this system, party members can earn additional moves by exploiting enemy weaknesses. Battles are turn-based and played with teams of four demons.
On the 3rd of October 2018, Sega announced it would discontinue Dx2 for Belgian players effective the 18th of October 2018. Belgian anti-gambling laws prevented the free-to-play model, which relies on gacha mechanics, from being legally operated in that market.
Dx2 features over 250 demons in its roster. The final released version included models for over 180 demons, with over 40 of those models developed specifically by Sega for the game; the remainder were reused from other entries in the series.
Dx2 received generally favorable reviews according to Metacritic. Critics praised the game's graphics and its faithful adaptation of the Shin Megami Tensei press turn battle system. Some reviewers, including Dave Aubrey of Pocket Gamer and Zack Reese of RPG Site, felt the game did not reach the standard of the mainline SMT series, particularly in story and character depth.