For the WC games 1-5 they have subtitels, but the main titel is WC, WC2,WC3 ans so on....lets see if I could get all the subtitels together
WC1 -> No subtitle
WC1 Secret Missions 1 -> ???
WC1 Secret Missions 2 -> ???
WC2 -> Vengance of the Kilrathi
WC2 Special Operations 1 -> ???
WC2 Special Operations 2 -> Crusade
WC3 -> Heart of the Tiger
WC4 -> The price of freedom
WC5 -> Prophecy
WC5 Secret Ops -> No subtitle
Now their have been some games that are in the same universe, but not in a strict historical order.
WC: Academy -> First try on a "Build your own missions" for WC
WC: Armada -> A "strategie" game in the WC Universe
WC: Privateer -> Trade and fight sim.
WC: Privateer 2 -> "The Darkening" also Trade and fightgame with real actors and cinematic sequenzes.
WC: Kilrathi Saga -> Contains the Win95 version of the first 3 games.
And now the titels of some mods in development
WC: Unknown enemy -> Has been release, based in the WC5: Secret Ops engine (vision). Can be found here
Unknown EnemyWC: Standoff -> Still in development, first demo has been released. Also based in the Vision engine. Can be found here
StandoffWC: Saga -> Well this is our forum so I guess you know what its about ^_^
WC: Privateer Remake -> Don't know a lot about it...as the name says they try to recreate Privateer
PrivRemakeWC: The Reckoning -> Privateer remake based on the Freelancer engine.
PS: As far as I know some of the games are on the abandoneware sites, but I don't know if they realy are abandoneware.
So try to find the games on Ebay if you want a legal copy.