Headbangers: Rhythm Royale

If you want to get this achievement as quickly as possible, the best way would technically be to queue and AFK every game while you do something else, to make the games as quick as possible.

But if you are trying to 100% the game, there's no real need to go after this achievement, because you will probably already have played 100+ games by the time you complete those. So just focus on winning the games, and most achievements will pop naturally.