Shin Megami Tensei: Devil Survivor is a tactical role-playing video game in the Megami Tensei series developed by Atlus for the Nintendo DS. It was released in Japan on January 15, 2009, and in North America on June 23, 2009. An enhanced port for the Nintendo 3DS, Shin Megami Tensei: Devil Survivor Overclocked, was also developed by Atlus and released in 2011 for Japan and North America while in 2013 for Europe.

Devil Survivor is set in modern-day Tokyo and follows a 17-year-old student and his friends, who see an outbreak of demons with some of them becoming their allies. The Protagonist also finds he has the ability to see a person's remaining lifespan and decides to work to avoid as many deaths as possible. Devil Survivor is a tactical role-playing video game where the player and computer control a number of squads composed of one leader and two supporting characters. Between combat, the player can explore several districts in Tokyo to either advance the plot by speaking to specific characters, discover new information, or take part in "free battles". The narrative can branch in multiple ways that result in different endings, which depend upon the player's decisions during critical moments throughout the story.