Can anyone tell me how you access the unnlockable characters in this game.... I got all the ones it would give me.... then I couldnt get anymore.... so. i went online and looked for ways to unlock the rest.... there are like 20 diifferent stories out there about how to do it.... and none seem to work. I played the "score challenge" mode (or whatever its called) and that seemed to work....because the Sentinal and Thanos became available... so I bought thanos.... and went to get more points to get the rest.... then when I came back they were gone again.... so. I dont know what to do. I have never even seen Gambit or Magneto available. any help? please?
thanks.