Jack Cayman (Madworld/Anarchy Reigns) vs Marcus Fenix (Gears of War) is a UniVS request. Anyone can put in their own thumbnails or leave their own bets on who would win.
Badass, grumpy old men who live in terrible worlds filled with murder, blood, and chaos all over the place. They both use a large arsenal but their weapon of choice is a chainsaw, and they use it to cut down their enemies with relative ease.
He takes on opponents that Marcus would need super weapons to kill on a daily basis, Marcus can't hope to scratch him. Not to mention that Jack fought the Black Barron, and dodged a lightning kick at pretty much point blank range, as well as escape the pull of a mini black hole.
Jack just edges out in every category that matters.