This is one part of a multi-part RAR archive. You need all parts (Part 1, Part 2, etc.) in the same folder to successfully extract the game files using a tool like WinRAR or 7-Zip . Where to find it:
0.2.5m (The "m" typically denotes a specific patch or monthly update). FromTheEclipse-0.2.5m-pc.part3.rar
If you are downloading this from a third-party "repacker" site, ensure you have downloaded all corresponding parts (part1, part2, and part3) or the extraction will fail with a "missing volume" error. Are you having trouble extracting these files, or This is one part of a multi-part RAR archive