Warhammer: Dark Omen is a real-time tactical wargame and the sequel to Warhammer: Shadow of the Horned Rat. It is a seminal exemplar of a game of the real-time tactics genre. First released for PC, it was later released for the Sony PlayStation. An expansion was scheduled and advertised but never released.

Rendered entirely in a freely rotatable- and zoomable isometric 3D overhead perspective, the game features terrain, terrain features and buildings, and support for the first-generation Voodoo 3dfx 3D accelerator card effects. The 3D terrain and features are combined with 2D sprites ("billboarding") to render the hundreds of individual units simultaneously on-screen on the limited hardware of 1998. Dark Omen is based on the Warhammer Fantasy Battle miniature tabletop wargame rules and situated in the Old World in the Warhammer Fantasy world and makes use of the vast background, creating a storyline that develops over the course of the game through illustrations and voice-acted conversations.