this is sort of absurd, but i'm just wondering if anyone has made a mod where you can play as a Teenage Mutant Ninja Turtle or somebody from that show. sorry; i just want to shoot a Anti-Materiel rifle as Splinter.

come on i know somebody has made one...

The closest thing I've seen to that is a race mod that let's you play as a digimon, though it's still pretty far from what you're asking for.

Heroes in a half shell?

Turtle power?

Patrolling the Mojave almost makes you wish for a pizza pie, cowabunga, dude.