This is absolutely moronic in my opinion, but it works. If you are having issues with either game failing to launch, my guess is that you have a joystick/controller plugged into your PC. Disconnect it and try again. I have been getting all of my Steam Summer Sale purchases set up for play and was having issues with these two games.
I unplugged my Xbox 360 controller and everything works fine now.
If anyone from Telltale games reads these forums, might I suggest a patch in the very near future, before you have a lot of gamers on Steam demanding a refund. :mad: