When a game this large—roughly —is distributed outside of standard launchers like Steam or the Epic Games Store , it is often split into many small files (parts).
To successfully install the game, you must have all parts (e.g., part01 through part16 and beyond) in the same folder. UNCHARTEDLegacyThievesCollection.part16.rar
You only need to right-click and extract Part 1 ; your extraction tool (like WinRAR or 7-Zip) will automatically pull data from the subsequent parts, including part 16, to reconstruct the full game files. When a game this large—roughly —is distributed outside