Horror Nightmare Collection Achievements Full list of all 8 Horror Nightmare Collection achievements.The base game contains 6 achievements, and there is 1 DLC pack containing 2 achievements.Filter Achievement View View Image viewList view Sort by Won first then by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc DLC Packs Group DLC packs together in list DLC Filter AllOwnedNone What are achievement flags? Click to find outApply AllWonNot won Base Base Game (Excludes DLC) 61 6 108 (80%) Port To HellComplete Port To Hell 09 November 2025 - Add a guideTerror GnomeComplete Terror Gnome 09 November 2025 - Add a guideHaunted MineComplete Haunted Mine 09 November 2025 - Add a guideEvil CrowComplete Evil Crow 09 November 2025 - Add a guidePauls Lost RemainsComplete Pauls Lost Remains 09 November 2025 - Add a guideForsaken PrisionComplete Forsaken Prision 09 November 2025 - Add a guide Add-on Unknown Pack 20 20 2 00 (0%) Deep SOUPComplete Deep SOUP Locked - Add a guideTerminal FleshComplete Terminal Flesh Locked - Add a guide