Here is the full list of all 50 NBA 2K20 achievements.
Win a game
Get more rebounds, blocks, and assists than your opponent
Make 1 Green Release shot in a game
Score 10 points in a MyCAREER game
Score 20 points in a MyCAREER game
Score 50 points in a MyCAREER game
Get 5 assists in a MyCAREER game
Get 10 assists in a MyCAREER game
Get 15 assists in a MyCAREER game
Get 10 defensive rebounds in a MyCAREER game
Get 20 defensive rebounds in a MyCAREER game
Get 3 offensive rebounds in a MyCAREER game
Get 5 offensive rebounds in a MyCAREER game
Get 3 blocks in a MyCAREER game
Get 5 blocks in a MyCAREER game
Get 3 steals in a MyCAREER game
Get 5 steals in a MyCAREER game
Make 5 free throws in a MyCAREER game
Make 10 free throws in a MyCAREER game
Make 5 three-pointers in a MyCAREER game
Make 10 three-pointers in a MyCAREER game
Make 15 three-pointers in a MyCAREER game
Be named Player of the Game in MyCAREEER
Score or assist on half your team's points in a MyCAREER game
Record a double-double in a MyCAREER game
Record a triple-double in a MyCAREER game
Record a quadruple-double in a MyCAREER game
Activate your MyPLAYER’s Takeover meter in a MyCAREER game
Win A MyTEAM game with a starting lineup of Atlantic Division players
Win A MyTEAM game with a starting lineup of Central Division players
Win A MyTEAM game with a starting lineup of Southeast Division players
Win A MyTEAM game with a starting lineup of Northwest Division players
Win A MyTEAM game with a starting lineup of Pacific Division players
Win A MyTEAM game with a starting lineup of Southwest Division players
Collect a player card of every gem color in MyTEAM
Play a game with two players who form a duo in MyTEAM
Acquire a player with Tokens in MyTEAM
Reach the G.O.A.T. Collector Level in MyTEAM
Make an on-the-fly defensive coaching adjustment during a game
Make 5 Green Release shots in a single game
Make 10 Green Release shots in a single game
Win a game by more than 10 points
Win a game by more than 20 points
Outscore your opponent by 10 points in a single quarter
Take a 10 point lead into halftime
Score the first 10 points of the game
Go on a 20-0 scoring run in a single game
Make 10 three-point shots in any one game
Turn the ball over 10 fewer times than your opponent
Finish a game in which all 5 starters score double-digit points