Mortal Kombat II (SNES)

After the massive controversy about how Nintendo's content guidelines took out half the point of the first game and proved that "Genesis Does What Nintendon't", the go-ahead was given for more violent games to appear on Nintendo platforms. As such, the SNES Mortal Kombat II was practically arcade-perfect, except you didn't have to shove coins into your cartridge slot every ten seconds when fighting the ever-cheap bosses.

Regional Differences
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The Japanese version is unique in that it has...censorship. Blood is recolored green, and the game palette fades into greyscale when a Fatality begins.

It's not known whether this was done by Nintendo of Japan, or Midway themselves.

Revisional Differences
The original US release (v1.0) does not show the fighting demonstration during the intro. This was added in v1.1 and carried over to the Japanese and European releases.