When Mortal Kombat 4 underperformed, Ed Boon and John Tobias knew they needed to do something bold for the follow-up, which led to them killing off the central hero, Liu Kang.

3. Liu Kang Liu Kang is regarded as one of the faces of the Mortal Kombat franchise for a reason, in addition to being one of the original Mortal Kombat champions and a generally kind person.