Undead Nightmare

Summary

In Undead Nightmare, players ride as John Marston through a cursed frontier, rescuing settlements, burning coffins in graveyards, and hunting legendary mounts while scrounging for ammo and crafting aids to survive the hordes. Hailed as one of gaming’s standout expansions, its alternate‑timeline horror twist and mythical hunts became a beloved counterpart to the base game’s classic Western.