yes, if the USB has enough memory, usually a 2GB will do, if not, a 4GB will be plenty, just copy and paste the counter-strike file onto the USB
You can download the latest Counter Strike, at store.steampowered.com
Counter-Strike games are available to download via Steam.
Softonic has it if you just google Counter-Strike Extreme.
Type in : Download Free Counter Strike (version)
Download steam from steampowered.com and search for counter-strike source
yes
Steam.
On the internet.
To download counter strike source first install Steam at Steam com. then search up Counter Strike Source. it will be in a package with garrys mod, you can buy them both separately or together for £15.00
On steam.
No it's not safe i downloaded counter strike on Internet and i got a virus warning. So i recommend you don't download it on Internet.
you can go to steampowered.com and download steam client and you can select their online steam store and you can download many games including Counter strike Source CZ and 1.6