some unofficial "highly compressed" versions are advertised online, claiming sizes as low as Key Facts on File Size and Compression Standard Size
Call Of Duty Modern Warfare 3 [ MULTI][ WII Scrubber][ PAL]. 7z : Free Download, Borrow, and Streaming : Internet Archive. Internet Archive Call of Duty MW3 Wii Installation Guide | PDF - Scribd
(Also, I can format it using Markdown if you want)
Here is the step-by-step guide to maximizing quality while minimizing storage:
: These archives frequently contain trojans or other malicious software instead of the actual game.