Here is the full list of all 41 Super Mega Baseball 3 achievements.
In Franchise mode, sign a player with an overall skill of C- or below.
In Franchise mode, sign a player to a salary of $10m or more.
While editing a Custom team, increase all of one player's skills to 99.
Hit a 500+ foot home run.
Win the championship of a Standard Franchise or Season.
Complete a standard regular season with your players leading the league in AVG, HRs, and RBIs.
In Season or Franchise mode, make it to the playoffs as the top seed in your league or conference.
Complete a standard regular season with your players leading the league in ERA, Ks, and WHIP.
In Standard Franchise or Season mode, win every game in the regular season.
Pitch a 9+ inning perfect game with a single pitcher in Franchise, Season or Elimination mode.
Foul off 4 pitches with a 2-strike count against the CPU.
Pitch 10 complete-game wins in a single regular season (9+ inning games only).
Pitch a 9+ inning complete-game shutout in a Standard Franchise, Season, or Elimination game.
Make an out with a diving catch.
Get two outs on the same play against the CPU.
Strike out 3 batters while throwing exactly 9 pitches in a single inning against the CPU.
Strike out 15 batters in one game with a single pitcher against the CPU.
Reach a 12-run lead in a Franchise, Season, or Elimination game.
Strike out a pinch hitter with exactly three strikes against the CPU.
Hit a home run.
In Franchise mode, make the playoffs with an average team age of 33 or more.
In any Custom game mode, play a championship between two user-controlled teams.
Pick off a baserunner when playing against the CPU.
Hit a home run with the bases loaded when down by exactly 4 runs.
Overcome a 5-run deficit for a win in a Franchise, Season, or Elimination game.
Hit a home run in every stadium.
In Franchise mode, increase a player's overall rating to S through Player Development.
In Franchise mode, end the regular season with a payroll less than 50% of your team's budget.
Throw out a CPU-controlled baserunner attempting to steal a base.
Get a base hit with a bunt while playing against the CPU.
Hit 4 home runs in a row against the CPU.
Steal 3rd base with a pinch runner against the CPU.
In Franchise mode, remove a negative trait from a player through Player Development.
Hit a single, double, triple, and home run with the same player in a single game.
Win the championship of a Custom Elimination.
Win the championship of a Custom Franchise or Season.
Win the championship of a Standard Elimination.
Win 2 championships of a Standard Franchise in a row.
Win the championship of a Standard Season with a season average Ego of 80 or higher.
Win five championships in the same Standard Franchise.
Win a 9+ inning game against the CPU at Ego 99 where both teams are Standard teams.