First make every single player in Namibia's starting lineup a rubbish kicker
go to options edit teams and edit players then choose Namibia and go through each player reducing the following stats to 1 (when you have done this Namibia's Overall Rating should be 52)
Kicking
Kicking Power
Goal Kicking
Then go on to the Drop Kick Shootout on the main menu play as a team with good kickers I did this with Wales and play against Namibia on Hard set the weather to dry and the wind to none to help you they should hopefully miss the third kick you just have to make every single one the achievement will unlock once you win I did this on my first try Namibia had all their forwards kicking and they missed the third kick I unfortunately missed my fifth kick to win but they missed the kick after so I won the Shootout
Try using my method of using Wales if you wish but if not good luck trying to get this achievement