|Start a friendly match and play as a very good team (e.g. Real Madrid, Manchester United) against a really bad team (e.g. Mexican Premier League teams). Put the time of each half, to 10 minutes. Score 11 goals and then leave it to receive the achievement after the match. If you do not think you will get the goals needed, finish the match off anyway as it will count towards your 300 Game Winner achievement.|
An even easier way of doing this is to go into team managment on a Mexican team and then do a custom formation. Make the formation so there are no players in the centre of the pitch. You will find it so much easier, but setting the time limit higher also does the job.