I pre-ordered Fallout 4 on steam. Not only could I not get the game to run on two different pc's, but I couldn't get it refunded due to a technicality. I knew I should've waited but felt confident and bought the game early anyway. Unfortunate $60 I'm not getting back.
Biggest kick in the dick about the transaction was that the game ended up being underwhelming as well, especially for a $60 game.