PES 2010
28 Achievements
1,000
Xbox 360
Possession Play
Awarded for achieving a possession rate of 60% or higher in your 10 most recent matches.
25
How to unlock the Possession Play achievement in PES 2010 - Definitive Guide
For 10 games just keep the ball, pass it around between your defenders and just make sure you have 60% possession in each of your last 10 games. I think it is the average, I had about 45% possession in the 5th game before I got the acheivement and about 88% in another game later on so I would think it is 60% in the total possession over 10 games.