Here is the full list of all 37 Undisputed achievements.
Participate in an online fight for the first time
Lose a fight due to fouls/ref stoppage (punch below belt or headbutt moves)
Get a Knockdown with an illegal shot
Survive a dazed state by the skin of your teeth (Round end)
Win a fight after getting knocked down 5 times
Win an 8+ round fight that has George Groves vs Carl Froch
Win by KO in the 12th round
Win a fight by an injury stoppage
Win an 8+ round fight that has Joe Frazier vs Muhammad Ali
Customise your player card
Throw 10,000 hooks
Throw 10,000 jabs
Throw 10,000 upper cuts
Knock out any AI opponent on pro difficulty in less than a minute
Finish a fight with 66% or higher accuracy (with at least 30 punches)
Finish an 8+ round fight by winning every round.
Win a fight after having sustained a bad cut
Win your first online fight.
Have your 10th online fight
Have your 50th online fight
Break an opponent’s win-streak of 3 or more matches
Get yourself a win-streak of 5 online matches
Win at least one Prize Fight per day for 5 days in a row