In Shadowrun an RPG game that's played in an imaginary cyberpunk world, a character who chooses to replace extensive parts of his/her body with implants (like Cybereyes(U.V.) and Dermal Plate Armor), and makes a living as a hired gun. Can do lots of damage, really fast.

A good choice for a beginner, and an obvious choice for a munchkin, as you can survive a bit more with all the high-tech stuff to protect you...
Though i've seen some pros play Street Sammys, and they can really kick ass.