Sid Meier's Colonization Classic, Sid Miere"s Covert Action and Pirates Gold Plus Classic. I don't know how good the Linux port is but it has the logo for Night Dive. I thought even though they are a bit dated I should get them to support Linux porting on Steam. I hope they are good ports. I got Crusader Kings II last week to support Linux and I don't think that is a very good port. Hopefully they will make it better.
Its interesting that you mention "how good the Linux port is" Kinda sad that we have to wonder huh? I know The Witcher 2 and Shadowrun are having some problems, but for the most part, all of the native ports should run great on gaming hardware. You know... Nvidia, dual-core CPU, 4 Gig RAM... etc. I hope its not becoming a common trend for developers to rush through porting a game to Linux. That would just confirm to Window$ gamers that Linux isn't ready. I still have to try Borderlands 2, Torchlight II and Torchlight. Hopefully they are running great.
I play Boarderlands 2. Great port. The only problem is my mouse. I don't think its the game since Microsoft wireless mice and their keyboards are known to have issues in Linux. Hey its Micro$oft junk so what do you expect?