Full list of all 40 Infinite Minigolf achievements worth 1,200 gamerscore. It takes around 30-35 hours to unlock all of the achievements in the base game.
The base game contains 32 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 8 achievements worth 200 Gamerscore.
Reached level 50
Reached level 45
Reached level 40
Reached level 35
Won a Tournament while collecting all purple gems on Hard difficulty
Won all Tournaments on 3 themes
Scored a hole-in-one on 10 different holes on Hard difficulty
Your hole was rated more than 10 times
Reached level 30
Reached level 25
Rated 100 community holes
Got more than 700 bonus points from Fly Time
Reached level 20
Won a Tournament while collecting all purple gems on Easy difficulty
Won a Tournament while collecting all purple gems on Medium difficulty
Reached level 15
You have unlocked 50 avatar item
You have unlocked 40 avatar item
Created and shared a hole
Reached level 10
You have unlocked 30 avatar item
You have unlocked 20 avatar item
Reached level 5
You have unlocked 10 avatar item
Scored 25,000 points on a single hole
Used power-ups 100 times
Got the maximum point bonus from a Long Putt
Won 5 online multiplayer matches in a row
Won 4 online multiplayer matches in a row
Won 3 online multiplayer matches in a row
Won an online multiplayer match
Putted the ball into the hole
Won all Tortuga tournaments on Hard difficulty
Won all Tortuga tournaments on Normal difficulty
Won all Tortuga tournaments on Casual difficulty
Created and shared a hole in the Tortuga theme
Won all Hangar 37 tournaments on Hard difficulty
Won all Hangar 37 tournaments on Normal difficulty
Won all Hangar 37 tournaments on Casual difficulty
Created and shared a hole in the Hangar 37 theme