Here is the full list of all 13 NBA Playgrounds trophies - there are 9 bronze, 3 silver and 1 gold.
Win all tournaments
Unlock the first 100 players
Score 150 three-pointers
Unlock the first 50 players
Reach gold level with one player
Activate 5 Lottery Picks in the same game
Score 100 dunks
Execute 50 alley-oops
Score from your backcourt without using a lottery pick
Score at the last second
Win your first game
Unlock all tournament challenges
Unlock the first 150 players