you really have to take this under consideration

sure gordon freeman has no milatary training but he singlehandedly took out a whole alien invasion!

MC has alot of milatary training and wepons and he is also a pretty smart person

but when it really comes down to it gordon will probably win

i usally go on Gmod and use gordon npc and MC npc(you get it on addons)and see who wins

oh and by the way WWGFD?!!!!