I have Humble Bundle Steam codes for: Amnesia: A Machine for Pigs FEAR FEAR 2 FEAR 3 Gotham City Impostors: Professional Kit Warhammer® 40,000: Dawn of War A few other things. You're free to have one for a copy of Portal. Trying to get a friend into gaming and what better place to start than Portal? We can use a mod as an intermediary.
Never mind guys. Some generous soul on Reddit gifted me a copy (well technically traded for nothing). Thanks anyway! . Useless bloody sods....