Slayer

Slayer can refer to:
 * of Final Doom: The Plutonia Experiment.
 * The Doom Slayer, a title given to the protagonist of Doom (2016).
 * SlayeR (WAD), a 2001 map set by Richard Wiles which was considered by Doomworld as one of the Top 100 WADs of All Time.
 * Simon Judd (SlayeR), the developer of the editing utilities SLumpEd and SLADE.