Mortal Kombat is the name of more than one artist.

1) Serbian metal punk
2) Electronic group

1) Serbian metal punk band from Beograd
Members:
Kriki - vocals, guitar
Stole - drums
Laza - guitar
Gera - bass

more info and some songs:
http://www.myspace.com/mortalkombatbend
http://www.facebook.com/mortalkombatbend
Official site: www.mortalkombatbend.com

2) Electronic group consisting of Erwin Willemans, Koen Andries and Tim van der Linden.

It may also be an incorrect artist tag for the soundtrack to a series of fighting games. The famous "Mortal Kombat Theme" is called "Techno Syndrome" and is produced by The Immortals. Please do yourself and Last.fm a favour and fix your tags by putting the actual artist name in the artist field. The easiest way is to use MusicBrainz Picard.
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