How do I install CS:S without installing HL2?

If I remembered correctly, you can go to http://www.steampowered.com/ and get a copy of Steam.

After installing, log in using your account that is registered with HL2. Just click on CS:S inside the Steam engine and it will start to download. It should work as the steam engine will be able to verify that your account is associate with HL2.

This way you can play CS:S without installing HL2.

Note: You can also find a copy of steam engine inside your HL2 disc, but downloading from the web will get you the latest version.

definite, it truly works. you're pondering 1/2 existence. you desire 1/2 existence for Counter Strike. Counter Strike is a 1/2 existence mod. Valve observed the fulfillment of one/2 existence and offered the rights for it from the developer. They made Counter Strike a million.6 and Counter Strike source, that are both standalone video games.

CS is sold as a standalone game which just comes with Source. It isn't free though, it's like $20. It's well worth it in my opinion. Try DOD as well.