RTS games have always been a favorite of mine since I was a boy, and a recently rediscovered the genre after buying the "Relic Pack" on steam which included Dawn of War and Company of Heroes.
These games I played pretty much as they were released:
Dune 2 (1992) - First and greatest, spent many an hour playing
Command & Conquer (1995) - Another genre defining title, great soundtrack.
Red Alert (1996) - I found it dissapointing.
Settlers II (1996) - Very detailed game.
Age of Empires (1997)
Age of Empires: Rise of Rome (1998)
Dune 2000 (1998) - Dated looking and dissapointing Remake of the classic title.
Age of Empires II: Age of Kings (1999) - Genre Classic
Age of Empires II: The Conquerors (2000)
Command & Conquer: Tiberian Sun (2000) - Dipping my toes back into the CnC franchise, again not too great.
Emperor: Battle For Dune (2000) - Better than the previous remake, but still not great.
Games tried/played but not bought/didnt get into:
Total Annihilation (1997)
Starcraft (1998) - Highly rated, fun multiplayer, but didnt hook me.
Warcraft III: Reign of Chaos (2002)
Settlers: Heritage of Kings, The (2005)
These games Ive tried so far in 2009:
Warhammer 40,000: Dawn of War (2004) - Having a great deal of fun playing through this game and its expansions.
Warhammer 40,000: Winter Assault (2005)
Company of Heroes (2006) - This one i need to try more.
Warhammer 40,000: Dawn of War: Dark Crusade (2006)
Warhammer 40,000: Dawn of War: Soulstorm (2008)
Warhammer 40,000: Dawn of War II (2009)
What is everyone else's RTS Timeline?
.
Are there other great games out there Ive managed to miss that I should checkout?
These games I played pretty much as they were released:
Dune 2 (1992) - First and greatest, spent many an hour playing

Command & Conquer (1995) - Another genre defining title, great soundtrack.
Red Alert (1996) - I found it dissapointing.
Settlers II (1996) - Very detailed game.
Age of Empires (1997)
Age of Empires: Rise of Rome (1998)
Dune 2000 (1998) - Dated looking and dissapointing Remake of the classic title.
Age of Empires II: Age of Kings (1999) - Genre Classic
Age of Empires II: The Conquerors (2000)
Command & Conquer: Tiberian Sun (2000) - Dipping my toes back into the CnC franchise, again not too great.
Emperor: Battle For Dune (2000) - Better than the previous remake, but still not great.
Games tried/played but not bought/didnt get into:
Total Annihilation (1997)
Starcraft (1998) - Highly rated, fun multiplayer, but didnt hook me.
Warcraft III: Reign of Chaos (2002)
Settlers: Heritage of Kings, The (2005)
These games Ive tried so far in 2009:
Warhammer 40,000: Dawn of War (2004) - Having a great deal of fun playing through this game and its expansions.
Warhammer 40,000: Winter Assault (2005)
Company of Heroes (2006) - This one i need to try more.
Warhammer 40,000: Dawn of War: Dark Crusade (2006)
Warhammer 40,000: Dawn of War: Soulstorm (2008)
Warhammer 40,000: Dawn of War II (2009)
What is everyone else's RTS Timeline?
.
Are there other great games out there Ive managed to miss that I should checkout?