Fever_Discordia: HalfLife? (or maybe HalfLife 2 because I don't remember seeing Gordon's car in the first one...)
Ghorpm: Nope, never played any HalfLife game. Do all of my hints fit to Gordon's story? Because in the game I have in mind all of them do ;) And in a pretty straight-forward style (OK, the last one is subjective)
Well I've only play HL1 so I wondered if some of them were references to the second one (and episodes) But he IS a physicist and his experiments ARE dangerous (opened a dimensional rift to the planet Xen out of which all sorts of gribblies came!) and his hair colour IS undesirable (
ginger!)
Hmm.. Back to the Future - the Game almost fits but then you'd be counting Doc Brown and not Marty as the protagonist, which would be weird...
(You'd also have to ignore how bad DeLoreans were in real life too, I guess)