Real-time strategy

Thank you :)

Age of Mythology.

Well, I really enjoyed it as a child. Just an honorable mention. :P

for RTS.. Empire Earth, Red Alert games, heck some Command and Conquer I liked

.... I suck at these games though

Starcraft, Warcraft, Command and Conquer, Total War games. The list goes on.

RED ALERT!

Warcraft 2

Supreme Commander is very nice

Warcraft II+III, Age of Empires II+III, KKND, Starcraft II, Warhammer 40K series.

Been mentioned already, but C&C: Red Alert 2 is the best RTS ever.

:crosses arms:

RUSE

Medieval 2: Total war + kingdoms, COH, Rome: Total war, Dawn of war series, Warcraft III, Starcraft 2, and other stuff.

Warcraft 3, Red Alert, AoE 2, If you are nostaliga then Dune 2000 and Tzar burder of the crown.

Battle Realms was my favorite, but it's getting pretty old now.

Dawn of War, its various expansions and the sequels are all excellent RTS games. I only wish that the fantastic Homeworld and its sequel (by the same devs, incidentally) would make it to Steam one day.

Also I'm a huge fan of the very first Total War: Shogun. The mix of grand turned based campaign strategy and the real time battles proved irresistible. I really should play the sequel more, as I have that too.

Almost forgot, Planetary Annihilation looks like its going to be epically awesome

Total Annihilation, and StarCraft 2 with friends.
WarCraft 2 also got a large chunk of my time (as did the first)
+1 to emotionengine's mention of Homeworld.
Command & Conquer's early games (fairly legitimately free these days, I think -- look up CNC Gold) had some uniquely cool vibes.
And I just started getting into the Total War series (starting it off right, with Rome), and I'm liking it.
I'm still early on the W40K RTSes, but they seem solid enough (though not much focus yet on resource management, which is kinda good in some ways).

1. Command and Conquer Tiberian Sun its free but i don't know how to extract a rar. file

2. Warcraft 3

3. Rome Total War, Starcraft, Age of Empires

Warcraft 3 and Age of Mythology

Warcraft 3 & Starcraft

Warcraft 3 & Starcraft seem to be the kings, but I could never get the hang of those. In the good old days, I wasted nights and weekends in Command & Conquer Red Alert 2 + Yuri's Revenge. Best more or less "oldschool" RTS I've ever played.

After that, nothing could beat the first Dawn of War and Company of Heroes for me. The Squad-System with "upgradeable" characters made it awesome, but Dawn of War 2 was already "too much" for me. I hope they don't do too much in Company of Heroes 2.

Age of empires 3.

I don't play a lot of RTS games as I prefer my strategy turn-based.

I've had a lot of fun with Age of Empires III, Age of Mythology, and Warcraft III though.

Star Craft, Warcraft and AOE.

Maybe you want to try a simpler type of RTS? Like maybe... Dota2?