all you do is fight one more match and then you retire. this should get you the achievements for retiring as a G.O.A.T etc. i also unlocked a few achievements when going to the fight now area, but might vary depending on how much you have played the game.<br />
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helpful hint if you cant do the beat Ali or Tyson on G.O.A.T, is to choose a boxer that has a longer reach. but the settings down to 1 round, and when fighting use the special signature move but to the body, as i find that they hardly block. and you should be able to get these achievements.<br />
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Thanks.<br />
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You should unlock at least 190g for just retiring. And apply my hints for beating ali and tyson on the other achievements and should be able to get a lot on this game.<br />
Also make sure that you have won a title already and moved up a weight class or will look out of order.