Who would emerge triumphant?

King Leonidas (300)
Kratos (God of War)
Achilles (Troy)(Without Invincibility)
Beowulf (Beowulf)
Riddick (The Chronicles of Riddick)
Master Chief (Halo)
Arbiter (Halo 2)
Samus (Metroid)
Sam Fisher (Splinter Cell)
Commander Shepard (Mass Effect)
Saren (Mass Effect)
Maximus (Gladiator)
Commodus (Gladiator)
R'tas Vadum (Halo 3) or...
Gordon Freeman (Half Life)

Beowulf, of course. He's just that cool.

GORDON FREEMAN WITHOUT QUESTION.

None of those other chumps have a gravity gun and crowbar.

Worst comes to worst, the G-Man can always take Gordon Freeman out of his own time to save his ass.

Yeah but Leonidas is in the lead because he are t3h 1337z0rz.
Lol, jk... not. I honestly think the battle would come down to Kratos vs Leonidas though.

Where Leonidas would rip Kratos' arms off by dodging his attacks with his Blades of Chaos and grab the chains and proceed to pull them until they ripped his arms off. He would then impale Kratos through the eye with his spear.

The medievalist in me begged me to vote Beowulf, but Leonidas is just toooo hardcore to lose. He even pwns after he dies.

Agreed. :)