Here is the full list of all 11 Real Boxing™ achievements.
Win 50 fights.
Perform 100 counterattacks.
Win the Boxing Legends belt.
Win all belts without getting knocked down once in the process.
Win the Night of the Champions belt.
Win the Roosters' Tournament belt.
Fully train your character.
Win your first fight.
Win your first fight by KO.
Win a fight without getting hit.
Complete the tutorial.