Harry Potter: Quidditch Champions

The Rough Game, Quidditch. Brutal! achievement does not need to be done in an online match.

In order to get this achievement, you must win a match with your opponents score being zero. There are two ways to win a match: By time running out (usually they are 7 minute matches), or by scoring 100 points. If you are playing in one of the campaign Cups, you can set the difficulty down to the lowest level to make this even easier. I don’t believe that the tutorial matches (The Weasley Burrow Garden Cup) count for this achievement.

Scoring goals as a Chaser earns 10 points, and catching the Snitch earns 30 points (and you can potentially catch the Snitch multiple times in one game). Try to steal the Quaffle from opponent Chasers whenever they have possession by tackling them with your Chaser using A or swap to a Beater and hit them with a Bludger to make them drop the Quaffle. Switch to your Seeker as soon as the Snitch is released to make sure the opposing Seeker doesn’t catch it.

Finishing the match (by time or score) with the opponent’s score being zero will unlock the achievement!

I hope this helps!