If you proceed with a repack, always scan the setup.exe with before running, and run the game in a sandbox (like Windows Sandbox or Sandboxie) the first time.

Highly compressed games are almost always unauthorized (pirated) copies. ARMA 2 is often sold cheaply on Steam, GOG, or Humble Bundle. This guide is for educational and archival purposes only. Downloading cracked games risks malware, data loss, and legal issues. Proceed at your own risk. 1. Understanding "Highly Compressed" ARMA 2 A normal ARMA 2: Combined Operations (base game + Operation Arrowhead) is ~15–20 GB. A "highly compressed" version is repacked to 3–6 GB using tools like FreeArc, Precomp, or KGB Archiver.