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