I have a few suggestions in the genres that Ross seems interested in, adventure games, action RPGs and puzzle games.
As far as adventure games go, I'd highly recommend Dropsy ( http://store.steampowered.com/app/274350/ ) which recently came out, very much in the vein of Lucasarts classics, reminds me a lot of Sam and Max and Day of the Tentacle except with some darker subject matter that it handles in a very mature and generally positive manner. There are also two DS games that I'd highly highly recommend though of course they'd have to be emulated, "999: Nine Hours, Nine Persons, Nine Doors" and "Ghost Trick". Much as I'd like to gush about these two, saying too much could spoil some of the enjoyment, suffice to say I think they're some of the best adventure games made in the past 20 years and they never got the attention they deserved.
As for Action RPGs, I'd highly recommend the Ys series both for its gameplay and its music. Its actually the series that created the Action RPG genre but its largely unknown in the West. The series is kind of like Zelda, most entries are standalone and many of them play drastically differently from each other. The series is best known for its excellent music (
) and boss fights. I'd recommend starting with Oath in Felghana ( http://store.steampowered.com/app/207320/ ), its probably the best in the series. Ross mentioned in some video that he's heard of pretty much every ARPG there is but a series of Japanese PC games that weren't translated into English for years seems like the level of obscurity where he might not have heard of it.
And last but not least, Infinifactory ( http://store.steampowered.com/app/300570/ ) is my favorite puzzle game by far. If you've ever played Spacechem, its like that except in 3D without the rigid size restrictions. Huge amount of fun.
Most of these games can be acquired fairly cheap if you keep an eye out though 999 and Ghost Trick probably are just going to keep rising in price since they're out of print at this point. The latest game in 999's series is coming out on PC though so if we're lucky it'll get ported as well.
