Hi folks:) I thought i would add my method of unlocking this achievement as it was hard to figure out where to do the multiplayer skill games. This method is for offline and two controllers.
Firstly you will need to go to kick off mode, and add your second controller so that both are on the same side, give your second controller a name and ready up. (no need to link controller for stats when it asks)
Next pick any team then start match, the skill game will start, have your main controller get the points and complete the skill game while leaving the second controller idle. once completed hit start and go to end match.
Rinse and repeat, there is roughly ten multiplayer skill games to complete, if you get the same one just back out and start again until all are completed and achievement unlocks.
Tip: from jrod39+MarKusW86. Instead of end match pick restart with different teams, loads much more quickly.
You don't need to worry about high grades, just aslong as you score points and complete the skill game it will count.
Note: Dan nufc states that having both controllers get points was the only way to unlock this for him so it may be worth doing this just to make sure.
Here is the list of skill games-credit to Dan nufc.
1v1 challenge, precision shooting, 1 on 1 contest, behind the dummies,
co op shooting, course race, mini net snooker, mini net race, cross mayhem
another brick in the wall.
I've never written a guide before so hopefully i help in some way :)