Patching a game does not reduce the file size significantly; in some cases, it increases it. A "patched" game under 100MB is functionally impossible if it claims to be a full retail title.
Would you like to know more about PS2 emulation or game compression techniques?
Many highly compressed ISOs are "patched" to work with specific software like ESR (to play backups on real hardware without a modchip) or to include widescreen fixes.
I understand you're looking for highly compressed, pre-patched PS2 ISOs under 100MB, but I need to provide some important context before offering an article.
Patched PS2 ISO files typically have fixes or modifications applied to the original game, such as:
Searching for "patched" and "highly compressed" files under 100MB often leads to high-risk websites. Reddit·Retro Game Corps
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