There are six hidden characters in Marvel vs Capcom 3 that you can unlock by earning player points. You can earn player points by playing arcade mode, playing multiplayer mode, completing character challenges, or spending time in training mode.
Once you have accumulated the specified player points, you can unlock these hidden characters. You can use all these methods to accumulate player points or you can finish arcade mode more than once.
You can unlock following hidden characters in Marvel vs Capcom 3 by accumulating the specified player points. For brief history of these characters and tips on how to play them, check our Marvel vs Capcom 3 Characters, Moves and Combos Guide.
Akuma

You can unlock Akuma, once you have accumulated 2,000 Player Points. If you play the game on easy mode, you will be able to accumulate these points pretty quickly. You will need to finish arcade mode once to unlock Akuma.
Sentinel

You can unlock Sentinel once you have accumulated 4,000 Player Points (PP). You will need to finish arcade mode twice to accumulate 4000 player points and unlock Sentinel.
Hsein-ko

You can unlock Sentinel once you have accumulated 6,000 Player Points (PP). Easiest way is to beat the arcade mode thrice, accumulate 6000 points and unlock Hsein-Ko.
Taskmaster

You can unlock Sentinel once you have accumulated 8,000 Player Points (PP). Easiest way is to beat the arcade mode four times with different characters, accumulate 8000 points and unlock Taskmaster.
Jill Valentine

Jill Valentine will be made available via DLC so you need to buy the DLC to unlock this character.
Shuma Gorath

Shuma Gorath will also be made available via DLC so you need to buy the DLC to unlock this character.
Both DLC characters will be available for purchase on March 15th.
