Navagon: In regard to the Gamersgate sale: does anyone know what Dimensity and Hazen are like? I've never even heard of them before.
Well, they both claim to be action RPGs, both from 2008, so you're looking at something Diablo-esque, then.
Hazen claims to be a Chapter I episodic content type game, and is only about 700 MiB. I consider episodic games to be a paid demo or trial, myself.
Dimensity seems to be a larger game (2.5 GiB), but it seems to be more of a HoMM (it talks about raising armies) Diablo combo. If I was going to get a game, it would probably be that one. It also does have copy protection (SecuROM), in case you seek to avoid that and hefty-ish graphical requirements (Video card/Pixel shader).
I cannot find any reviews, even on MetaCritic, so I cannot comment on Windows 7 compatibility or anything.
Hope that helps!