If you have a legitimate license for KSP, you can typically access older versions through these official channels: : Right-click Kerbal Space Program in your Steam Library. Select Properties > Betas .
Versions after 0.13.3 are not free ; you must own a copy of the game to legally download and play version 0.25. 2. Writing a Paper on KSP 0.25 Kerbal Space Program -KSP- 0.25.0.642 download for computer
Look for a section titled or similar. Most storefronts only keep the last version of each major development cycle (e.g., 0.90, 1.0, etc.), so 0.25 may or may not be listed depending on current availability. Key Features of Version 0.25 If you have a legitimate license for KSP,