Kingdom Hearts II + maxed-out Final Form + Cerberus Cup = Bliss.
To explain: Final Form in KHII is game-breakingly powerful; can you say "Lightning-fast uber-combos that wreck the shit of everything that looks at you funny"? Or "Wipe a set of trash Heartless from the face of the World by jumping"!? Alas, it's balanced by the fact that it's hella expensive to activate and doesn't last very long. HOWEVER, in the Cerberus Cup, the rules are set up so you can spam Final Form. If you know what you're doing, you can have it last all the way 'till halfway through the final round! Y'know what that means? KILL ALL THE THINGS! IN TWO SECONDS FLAT!
Also, in this one obscure game on the Wii called The Last Story, the main character's SUPPOSED to be an upstanding, chivalrous knight, but there's absolutely nothing stopping you from trolling the hell out of everybody and anybody you see in the main town. Hell, there's at least one sidequest that encourages being a troll! Dropped banana peels, "accidentally" knocked-over fruit baskets, barging into people at full sprint, cheating on your girlfriend by picking up random chicks (with the option of being an absolute bellend), stealing from poor kids and running head-first into low-hanging shop signs. The combat's pretty dang cathartic as well; there is NO BETTER WAY to end a fight than to sweep your sword into the opponent's legs, knocking him horizontal and slamming his ass into the ground with your blade.. All in slow motion, of course.