Metal Slug Psp Iso Highly Compressed Instant

: This is the primary release for the system, featuring a compilation of titles including Metal Slug 1, 2, X, 3, 4, 5, and 6 .

The PSP scene developed the .CSO format—a compressed ISO. Tools like CISO or YACC compress the ISO using zlib or LZMA. A standard CSO might be 60% of the original. But a "highly compressed" CSO uses extreme dictionary sizes and levels (level 9). This does two things: metal slug psp iso highly compressed