While "repacks" exist, the official game is available on Steam and frequently goes on sale.

The game was recently updated to Unreal Engine 5 , which significantly improved textures for monsters, vehicles, and buildings.

I notice you're asking about

Developed as a PvE stealth survival game, Mist Survival tasks you with surviving a pandemic-shattered world. Unlike standard zombie games, the "Infected" here are sensitive to light; they hide in shadows and only emerge in force when a thick, supernatural mist rolls across the landscape.

If you meant something else (e.g., a creepypasta, fan fiction, or in‑game notes), please clarify.

Mist Survival is a single-player, stealth-focused sandbox survival game where you must manage fatigue and stamina while surviving an apocalypse.