Seriously? Gordon Freeman? 

I knew the criteria for being a Cyborg was becoming more and more lax, but I don't think WEARING something makes you a Cyborg. The HEV may provide him with Morphine and Oxygen, but thats really all thats confirmed about it. Unless its revealed that he has special implants or something to link him to the suit, I don't he and the suit could be considered one and the same, which is the definition of Cyborg. It doesn't even fit the relaxed "have machines attached to you" requirements. So can we really consider him a Cyborg?