This paper will create, define & develop the concept of retroactive characterisation as a narrative device for games. In doing so, it will investigate a method of conveying character and narrative to a player after a given event has already taken place, hence, retroactively. The paper will present data collected through surveys and interviews held in conjunction with test sessions. The paper presents and discusses this data through compiled diagrams and interview transcripts, in order to fulfill its purpose of determining the validity of retroactive characterisation as a narrative device in games.