Disco Elysium is a role-playing video game about a troubled detective with severe amnesia who wakes up in a trashed room with no memory of who he is or the world around him. The player takes on the detective's role as he investigates a murder case in the city of Revachol, gradually piecing together his identity and uncovering the complex socio-political environment of the area. The game features no traditional combat; instead, it focuses on skill checks and dialogue to resolve events, exploring the protagonist's mind and personality through a system of 24 skills. The story is deeply narrative- driven, with a strong emphasis on the detective's internal struggles, political themes, and the mystery of the murder case.

The setting is a fantastic realist world with a rich history, primarily taking place in the impoverished district of Martinaise within Revachol. The protagonist, named Harrier "Harry" Du Bois, partners with another detective, Kim Kitsuragi, to solve the murder while coping with his own substance abuse and mental health issues. The game blends political and philosophical ideas with personal turmoil and detective noir elements to create a unique, immersive experience.

In essence, Disco Elysium is about identity, memory, morality, and the consequences of choices in a deeply detailed urban setting, putting heavy emphasis on narrative and character development rather than combat or action gameplay.