Gordon Freeman is, by all accounts, an ordinary man. He is not a skilled assassin, government supersoldier, or empowered mutant. He has no outstanding characteristics aside from being "the right man in the wrong place." And now he stands alone, armed only with a crowbar, against an interstellar coalition with the power to conquer and destroy worlds.
JakeBob said: It'd be the height of irony if, after he's done with all this Combine business, and victory is being celebrated, he finds the helmet of his HEV suit.