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