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.
Fully train your character.
Win a fight without getting hit.
Win the Roosters' Tournament belt.
Win your first fight by KO.
Win your first fight.
Complete the tutorial.