Who would win?

[kupocake]

Master chief needs two assault rifles to take some ugly ass trolls with blue blades:

Gordon freeman takes on some alien quadruple-bladed beast and two striders WITH A CROWBAR:

Word. Freeman doesn't even need a helmet - all he has against the ever present danger of cranial dismemberment and attack is a pair of rather thick glasses. He knows no fear.

 

[Asknoone]

DOOM 3 Marine. Think about it, the guy took on all of Hell and won! That goes beyond a Covenant invasion or some terrorists with a large metal robot(Metal Gear Solid). Not only that, but the guy has a BFG and a Soul Cube at his disposal.

Bah! He had it easy, his enemies had little to no intellect they hid in lockers...

 

[CombinePolice]

Freeman!

Freeman Rules!

He can blind people with his flashlight muhahahahaha!

And pwn you all with his true,small little friend,the CROWBAR

 

[Pesmerga]

Aliens Marines. Or Predators... Aliens, tho, pretty much pwn everything.