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