NBA Playgrounds
13 Achievements
1,000
6-8h
Xbox One
Fifty Deep
Unlocked the first 50 players
50
34.15%
How to unlock the Fifty Deep achievement in NBA Playgrounds - Definitive Guide
This will come naturally as you unlock cards. Easiest grind would be to just hook up a two player controller, destroy them and rack up the players.
Please refer to "Earn a Buck Fiddy" for more information.