A PSP-1000 (Fat) is the target, though it also works on 2000/3000 models.
: One of the oldest and most famous Minecraft clones for the PSP. While more basic than modern ports, it laid the groundwork for many "retextured" versions that added Minecraft-specific blocks and features. minecraft psp 321 fatzip
Get the minecraft-psp-3.2.1-fat.zip from a trusted source like Archive.org . A PSP-1000 (Fat) is the target, though it