0.2.5m (The "m" typically denotes a specific patch or monthly update).
The file is the third part of a split compressed archive for the PC version of the game From The Eclipse (version 0.2.5m). Details about this file: FromTheEclipse-0.2.5m-pc.part3.rar
Older or public versions are often hosted on Itch.io. FromTheEclipse-0.2.5m-pc.part3.rar