The “UT1D” suffix appears in no official Supermassive documentation. Community sleuthing suggests two theories:
: Use reputable community sites like Nexus Mods for verified game modifications. Until-Dawn-UT1D.zip
Files with non-standard naming conventions like Until-Dawn-UT1D.zip found on third-party sites are often associated with: The “UT1D” suffix appears in no official Supermassive