BLACKSTAR
[10] Knight
And then off course there's Marvel vs. Capcom 2 - arguably the most broken fighting game ever made. Only 16 out of 56 characters were truly tournament viable and out of those 16, 4 were so dominant that almost every team had them. The game is so full of bugs and glitches that to this day, new ones are being found (shoultzula just discovered a new Sentinel assist flight cancel glitch that gives the robot even more options). Yet at the same time, the game is considered one of the deepest, most competitively viable games out there and at the same time, is celebrated for it's brokenness.
competitively viable? Marvel 2? really? c'mon. :/