The closest matches on Steam are The Elder Scrolls IV: Oblivion Game of the Year Edition (2009), The Elder Scrolls III: Morrowind Game of the Year Edition, The Elder Scrolls V: Skyrim, Fallout: New Vegas and Kingdom Come: Deliverance II.
From the Steam games with at least 2,000 reviews and 80% or more positive, we keep the ones whose main player tags match The Witcher 3: Wild Hunt — Remastered's most closely, then show the closest first.
