There's a Diablo hack/slash/button blazer called FreeDriod. The controls take some getting use to, and the ability to access the editor makes it feel like SimCity when you send a tornado, but I like!

Well I still play Diablo - even on Wine it works fine. You will have to edit your firewall settings - aka the iptables - in order to update via Battlenet. Since Blizzard is trying to get people ready for Diablo 3, they don't mind if you forgot your keys.

I have played several pokemon rpgs via emulators with Wine, but its a pain. Better off just getting them for a DS or other hand held device

For actual open source, free games there are the following:
[ol]
[li] Freedroid [/li]
[li] Singularity [/li]
[li] NetHack [/li]
[li] ADOM [/li]
[/ol]

There are sooo many rpg games out there for Linux its not even funny. With the help of DosBox you can enjoy your favorites.

Check out:
[ol]
[li] abandonia.com [/li]
[li] reloaded.org [/li]
[li] sourceforge.net [/li]
[li] hotud.org [/li]
[/ol]

The best bet is to search for abandoned games and for open source/free games. Basically though, if its developed for Linux its usually under a GPL or a freeBSD license.

Some non-free games have been developed for Linux from S2 Games, but they are great games. Check them out at s2games.com/aboutus.php

Have Fun
-altNull

Another interesting list is

http://en.wikipedia.org/wiki/List_of_open-source_video_games

That list all sorts of fun stuff. Just "Ctrl-F" and look for "RPG".

BTW:

http://en.wikipedia.org/wiki/Crossfire_%28computer_game%29
CROSSFIRE!!!!!!!!!!!

Sorry.. *cough* has nothing to do with the game. Just brings back memories of a certain board game. *sigh*

Also, as noted before, there are lots of cool games that are windows based that can run pretty well under wine.
http://appdb.winehq.org/

Psst... GuildWars. (Personally liked it better then WoW) and its super cheap and no monthly fees. If you are into the whole MMO stuff.

Another non-free game that was one of my fav. was NeverWinter Nights. Which is native on linux.
http://nwn.bioware.com/downloads/linuxclient.html