Status: High Risk / Likely Malicious
The file you are referencing is likely a "repack" of the standalone mod Portal: Revolution. However, the group tag "KAOS" is a significant red flag. While "KaOs" is a legitimate scene group known for highly compressed repacks, they typically operate within specific circles. A file with this specific naming convention floating on general download sites is a common vector for malware, trojans, or adware bundles. portalrevolutionv170repackkaos
Portal Revolution is a free, standalone mod for Portal 2, developed by the team at Second Face Software. Released in January 2024, it received widespread acclaim for: Executive Summary Status: High Risk / Likely Malicious
Crucially, Portal Revolution requires ownership of Portal 2 on Steam. It is not a standalone game and does not contain any proprietary Valve assets beyond what the Source Engine requires. System Requirements (Minimum)
Even if a repack existed, downloading it would violate Valve’s Steam Subscriber Agreement and the mod’s Creative Commons–like license (which permits free distribution but not commercial use or DRM removal). Portal Revolution is already free – repacking it adds no value, only legal risk.