With so few good new titles being released these days, especially by major studios, I figured I'd make a thread for everyone to share your favourite classic or older games, especially if they're lesser-known titles that others might have missed at the time.
I'll open with The Saboteur (2009), Mercenaries (2005) and Saints Row 2 ( The 2008 original)
Since I grew up on real time strategies:
Dune 2000: it's simple yet fun and the cutscenes are very well acted, along with a fantastic soundtrack
Stronghold 2: this one still works on Steam and has a TON of user ceated content from maps, missions to an upgrade for the main campaign
C&C 3 Kane's Wrath: I would have put Tiberium sun as my favourite but I can't get a working copy (fuck you EA), so I'd recommend this one that came out in 2008. The campaign is great as Joseph D. Kucan kills it as Kane and you have more options in the standalone expansion from specialist troops like Zone Raiders to a fantastic bot mode.
They just rereleased the old C&C and Red Alert games on STEAM. So go get it!
Just had a look, you're right, well going to be playing Tiberium Sun in any downtime for a while
What I find hilarious though is every C&C game is rated highly positive EXCEPT 4, that really was the worst game in franchise till that mobile game, only good thing in it was Kane's performance.
All great options. Another really good older RTS is Star Wars: Empire at War. Still one of the best Star Wars games ever released.
Edit: I also loved the original Stronghold games, especially Crusader.
Tiberium Sun and Firestorm are both freeware. I dont have the URL on me but I downloaded them last year along with some fan patches and played through them for the first time. So good