I have all series of Counter-Strike games (not pivots sorry)! The games I have:

Counter-Strike Beta 5.2
Counter-Strike Beta 6.1
Counter-Strike 1.0
Counter-Strike 1.1
Counter-Strike 1.3
Counter-Strike 1.4
Counter-Strike 1.5
Counter-Strike 1.6
Counter-Strike Condition Zero
Counter-Strike Source

*and*

the best game of counter strike...

COUNTER-STRIKE GLOBAL OFFENSIVE!

I finally downloaded it. Before I download this game, I tried to download it, some download isn't worked, some download is worked but, game is always crash. But, I made it. And finally I got this game. Aww, never mind never mind. The games I haven't:

Counter-Strike Beta 1
Counter-Strike Beta 2
Counter-Strike Beta 3
Counter-Strike Beta 4
Counter-Strike Beta 7
Counter-Strike Neo
Counter-Strike XBOX
Counter-Strike Online

And guys, I hope you can download the Counter-Strike games what I have and you have fun. ;)