http://www.pcgamer.com/skyrim-mod-adds-a-realm-stalking-respawning-resident-evil-nemesis/

When I first played Resident Evil 3 I was genuinely terrified by its S.T.A.R.S.-hunting Nemesis antagonist, who would respawn after death and chase Jill Valentine screen-to-screen. Now, you can introduce the brutish Pursuer to the realm of Skyrim. 

Courtesy of Nexus user MihailMods, the Nemesis - Halloween Special mod launched earlier this month, and is available for both Skyrim Special Edition and the role-player's 2011 original.