All of my games are available to everyone for free.
However, if you enjoyed any of my games, a couple of bucks to cover website hosting costs and support my ongoing efforts would be gratefully appreciated. I think $2 per game enjoyed is a fair price. Thanks.
Dropbox (250MB Extra space)
Penzu (20% off yearly subscription)
Hole in the Wall Hosting ($10US per year for 300mb space, 30gb bandwidth)

John Romero was the creative inspiration behind many of IDs early titles, but got too big for his boots and was kicked out, but his reputation wasn't destroyed until many years later when he produced one of the worst and most expensive games ever: Daikatana.
Seriously, dude, you need to read Masters of Doom
speaking of which, have you seen...