Shin Megami Tensei: Tokyo Requiem

Shin Megami Tensei: Tokyo Requiem (真・女神転生 東京鎮魂歌) is an RPG game developed by Atlus and Bbmf for mobile phones.

Releases

 * Japan: April 27th, 2007 (iAppli)
 * Japan: August 1st, 2007 (S!Appli)
 * Japan: October 4th, 2007 (EZAppli)

Gameplay
Unlike many of the other mobile games, Tokyo Requiem was released in an episodic fashion, with a new chapter of the story being released every month over a period of six months. It features series staples such as demon negotiation and demonic fusion.

Demons can appear in groups of three different types. The map is displayed from a bird's eye view. The protagonist can have up to three members in his party.

Story
The story begins in December 24, 201X in Tokyo. The protagonist is meeting his girlfriend for a date. Suddenly, he receives a mail on his mobile phone. Attached is a file called the D.I.O. System, a demon summoning program.

At that point, a flash of light passes before the pair's eyes. Tokyo is destroyed in a nuclear explosion. Tokyo's Information Systems collapse. Out of the mountain of debris, survivors encounter a countless number of strange beings.