Adding teams that weren't in the original 2015 release.
The year that saw a massive resurgence in "Season Updates" and fan-made patches. The "Season Update" Phenomenon superpsxcomproevolutionsoccer2015pes 2 2021
Most players engaging with these "Pro Evolution Soccer 2015" mods aren't actually using a dusty console. They are using like PCSX2 (for PS2) or DuckStation (for PSX). Adding teams that weren't in the original 2015 release