Can anyone tell me where I could go to actually get free games to download and be able to play them with nonet?

I want to be able to download games to my computer. I just want to get games that you can play without being on the internet. Does anyone know where a site like this is. One more thing I don't want any free trials or even have to have a credit or debit card, checking, and etc. I just want to download for free.