Here is the full list of all 144 Out of the Park Baseball 21 achievements.
Closer strikes out the side
Steal Home
50 Game Hit Streak
Throw out 3 runners on the bases
3 HR in an inning
Pitch a perfect game
Record a 16-game win streak
Sweep a playoff series
Throw a 1-hitter
Achieve a pitching game score of at least 100
Strike out 18 batters in a game
Score 10 runs in a shutout
5 SB in a game
Strike out 15 batters in a game
3 DP in a game
40/40 Player
40 Game Save Streak
30 Game Save Streak
20 Game Save Streak
Hit a walk-off HR
Reach the finals
30/30 Player
20/20 Player
7 game HR streak
Shared Shutout for the team
6 game HR streak
CG Shutout on under 100 pitches
20 Game Win Streak
2 HR Game
3 extra-base hits in a game
4 game HR streak
Hit a leadoff HR
3000 Career Wins
Successfully construct a dynasty for your owner
Strike out 10 batters in a game
Pitch a shutout
Hit a Grand Slam
Complete all goals your owner tasks you with
Trade for a recent MVP winner
Strand the bases loaded
Achieve a solid season score
Win the championship on a low budget
Win the pitching triple crown
10 Game RBI Streak
1500 Career Wins
5 hit game
Score 6 runs in an inning
4 SB in a game
15 Game Win Streak
6 hits in an inning
Have every player in the lineup get a hit
500 Career Wins
40 Game Hit Streak
Win the Reliever of the Year award
Turn a Triple Play
Trade for a recent all-star
13 Game RBI Streak
16 Game Run Streak
Score 4 runs in a game
Get 5 RBI in a game
Score 15 runs in a game
Throw out 2 runners on the bases
Walk-off hit
Come back from a 4 run deficit to win
MVP of the All-star game
Have the top vote-getter for the All-Star Game
CG with no BB allowed
3 SB in a game
Win the championship in a sweep
First All-Star
4 hit game
First Contract Extension
Win the rookie of the year award
Achieve a top season score
Win the championship
Win the hitting triple crown
Have a player lead the league in BA
Have a player lead the league in wins
20 Game Hit Streak
13 Game Run Streak
10 Game Win Streak
Record a 12-game win streak
First Draft Pick
Win the MVP
Win the pitcher of the year award
Win the manager of the year award
Win a silver slugger
Win a fielder of the year award
Achieve a great season score
Complete an Owner Goal
Have a player lead the league in HR
Have a player lead the league in ERA
Reach the post-season
First Stolen Base
30 Game Hit Streak
Win the batter of the month
9 Game Run Streak
Win the pitcher of the month
7 Game RBI Streak
Record an 8-game win streak
Bat around in an inning
First Game Win
First Player of the Week award
Win the rookie of the month
First Series Sweep
First Save
First Quality Start
First Home Run
First Free Agent Signing
First Trade
6 hit game
3 HR Game
4 HR Game
Score 5 runs in a game
Score 6 or more runs in a game
Get 8 RBI in a game
Get 10 or more RBI in a game
Hit a walk-off Grand Slam
Hit for the cycle
Pitch a no-hitter
Score 10 runs in an inning
Score 15 runs in an inning
Score 20 runs in a game
Score 30 runs in a game
Score 15 runs in a shutout
Score 20 runs in a shutout
5 DP in a game
6 DP in a game
Combined no-hitter
Throw out 4 runners on the bases
Turn an unassisted Triple Play
4 extra-base hits in a game
5 extra-base hits in a game
5+ PA with no official AB in a game
9-pitch inning with 3 strikeouts
Hit for a natural cycle
4 strikeout inning
Come back from a 7 run deficit to win
Come back from a 10 run deficit to win
4 HR in an inning
5 HR in an inning
9 hits in an inning
12 hits in an inning
Score every inning