eFootball PES 2020

easy. started a new master league in england and pick liverpool, sim every match by selecting skip match every time you have a game, you'll end up winning every match pretty much.

i finished on 100 points W32 D4 L2 without having to reload saves. should be able to get this within an hour if you dont save very often and skip all cutscenes, transfer windows, etc.

New game -> club team lineup -> Barcelona -> Maradona
Transfer frequency - High
Negotiation difficulty - High
Starting difficulty - Large
1st Window Transfers - Enabled
Salary Display - Annual
Match level - Beginner
Match time - 5 mins
Currency - Pounds
Stops during transfer window - Only when there is progress
First thing I did was buy Ronaldo, Modric and Ramos ( I put every slider as high as it could go and put 1 year contract)
I skipped every game except for 1 which was a match with Madrid which I played for the Derby achievement.
I ended up getting the achievement after Match Day 30 never having lost a game.
Should take an hour.
This is exactly what I did and it worked.
Hope this works for you.

Start a new master league game, select club lineup and then select PSG.

Skip every cutscene, answer any questions and skip/sim every game until the achievement pops around 30 games into the season

May seem like very little effort went into writing this guide but trust me, far less will go into getting this achievement