Originally Posted by klewiss
Civilization III is really good, and Civilization 4 just came out.
Civilization 4 has been out for months. Fantastic game, highly recommended. If you prefer a sci-fi setting, Galactic Civilization 2 just came out and is getting great reviews, but I have not played it yet myself.
Originally Posted by Chosen
Whole fallout series
But Fallout and Fallout 2 are RPGs, and he specifically said he is tired of RPGs at the moment.
The original C&C games were fun as heck back in the day. I only mention it because they just released a "C&C: The First Decade" collection that has everything from the original C&C all the way up to Generals in one package, with everything updated to work in WinXP. Might be worth a look, that's a lot of RTS for the price of one game.
Starcraft is still the best RTS ever made, IMHO. I assume you have already played it. If not, forget everything anyone has said so far and go get a copy of Starcraft.