You may find "highly compressed" download links online, but these are often one of the following:

That said, if you are looking for (as if it existed for educational/gaming-culture context), here’s what such a repack might claim:

: Files meant for console emulators like RPCS3 (PS3) or Xenia (Xbox 360). Modern Warfare 3 (2011)

Treyarch built the game’s engine around console architecture, specifically the PS3’s complex Cell processor. Porting it back to PC would have required rebuilding the game from scratch. Consequently, there is of Call of Duty 3. So, what are people downloading?

If a file claims to be Call of Duty 3 compressed to a few hundred megabytes, one of two things is happening:

The only legitimate way to play Call of Duty 3 on a PC is through using legal copies of the game.

Searching for non-existent games under the guise of "highly compressed" or "free downloads" is one of the most common vectors for malware distribution. Risk Factor Description Trojan Horses