Here is the full list of all 20 Pool Nation achievements.
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Won 8 Ball Tour
Clear the table in Endurance
Reach 1500000 Points
First Win Against AI in Versus
Win One Game In All Rule Sets
Win First Star in Tour
Reach 4 minutes in Endurance
Earn 5000 points in one skill shot
Earn 10000 points in one skill shot
Win First Bonus Match in Tour
Reach 8 minutes in Endurance
Obtained all 298 stars
Won 9 Ball Tour
30 Ball Streak in Endurance
Win Online Tournament
Win Online Match
Reach 12 minutes in Endurance
Reach 20 minutes in Endurance
50 ball streak in Endurance