Infinite Minigolf

Not sure if this will work for everyone but if it does let me know. I had already beaten Giant Home 1 (Simon's Jokes) and didn't get all the purple gems. So I restarted and got the first two and missed the third. So I quit out and then resumed. I proceeded to skip every level to the end and still got 1st and the achievement popped.

I did this in the first Giant Home tournament. You can't restart a hole or the achievement is invalidated. All but the last hole are very easy to collect gems and you do most of them Hole-in-one. Last hole, the one with the moving car, are very tricky, so don't mind get hole-in-one, play it cool aiming to collect the last gem. Good luck... ;)