The Event Horizon is a four level PWAD for Doom II designed for Boom-compatible source ports created by Killer5. The maps use primarily stock textures and feature a nukage theme with the style of gameplay ranging from short and compact in the vein of Zzul Bases to slaughter. The mapset was uploaded to the idgames archive on May 30, 2021 and received an honorable mention at the 2021 Cacowards.