It’s still the PES 2017 engine. The "updated" part refers to database files.
When downloaders search for this exact keyword, they expect more than just a tiny file. Here’s what a legitimate, well-made 50MB compressed PES PSP update typically offers: pes psp highly compressed 50mb updated
Let’s be honest: squeezing a full PSP game into 50MB requires sacrifices. Here’s a honest breakdown: It’s still the PES 2017 engine