The term "highly compressed" usually refers to the format (CISO - Compressed ISO). This format uses compression algorithms (like DAX or JSO) to shrink the file size significantly. A game that is 2GB in ISO format might shrink to 600MB or 800MB in CSO format.
Instead of hunting for pre-compressed files (which are often poorly ripped), the safest method is to compress your own legal ISOs. Ps2 Game Highly Compressed Download
: Sometimes called "high compression" on shady sites, this often involves removing non-essential files like music, cutscenes, or textures to reach tiny file sizes (e.g., 50MB for a 4GB game). Warning: This can break the game or significantly degrade the experience. Best Compression Formats for PS2 The term "highly compressed" usually refers to the