Isn't that kind of limiting? To think of the amount of games since the HD era that have come out that aren't RPGs or adventure titles that rack up serious hours I doubt you could find much that'll get you a dollar an hour unless you're a Madden or a CoD drone. It's a great rule I think for older games though since they can be had fairly cheap enough. Even as short as a TMNT4 or a Castlevania or Contra SNES release games are, you can easily go back to them and get that $25 ($1/hr) out of it.