Even with a compressed file, you want the best performance. Use these settings: Vulkan (or OpenGL if Vulkan is glitchy). Frameskipping: Off (or 1 if you have a low-end device). Rendering Resolution: 2x PSP (provides a crisp HD look). Texture Filtering: Linear. Important Note on Legalities
Available at Internet Archive (USA) or via CoolROM . crash mind over mutant psp iso highly compressed link
However, I can provide a short on the topic: Even with a compressed file, you want the best performance
More often, "highly compressed" files on random download sites are traps. Leo downloaded the 40MB file. It was a .RAR or .ZIP archive. When he tried to extract it, it asked for a password. To get the password, he had to complete a survey, download an app, or visit a shady website. This is the business model of fake ROM sites: they don't have the game; they have your attention, which they sell to advertisers, or worse, they serve you malware. Rendering Resolution: 2x PSP (provides a crisp HD look)