This game is the updated version of eFootball PES 2020 which was released by Konami in September of 2019. This update was released to commemorate the 25th anniversary of the Pro Evolution Soccer series. 

• All the updated players and data are included in this game as well as the UEFA Euro 2020 game mode.
• You get to play with the biggest football teams in the world such as FC Bayern Munchen, FC Barcelona, Manchester United, and the PES-exclusive Juventus!
• Create your own dream team from scratch with this season update and play against the best teams in the world.

Reviews

For now, I’m not sure PES 2021 is worth forking out for if you can option file PES 2020. But if you don’t have PES 2020, PES 2021 is a decent shout at a decent price. Onward to the next generation!

Eurogamer.net  

With this Season Update, eFootball PES 2021 remains a solid and realistic football simulation. When compared to other sports sims and the offerings contained therein, one might think that Konami should and could have sold it as a brand new game.

GameReactor