The phrase "Halo 2 Highly Compressed" is a legendary relic of the mid-2000s internet—a time of Limewire, sketchy forum links, and the desperate hope of squeezing a 4GB DVD onto a 700MB CD-R.

and may contain malware or trojans. Experts recommend sticking to known community repacks (like those from R.G. Catalyst ) if you must use a compressed version. The "Rip" vs. "Repack"

Halo 2 Highly Compressed: Reliving the Master Chief’s Greatest Mission on a Budget

Many "highly compressed" downloads are hosted on sites that force you to fill out endless surveys to unlock a password. These are revenue-generation scams. The file usually does not exist, or the password provided is incorrect, leading you in an endless loop of data harvesting.