While the specific game file might work without viruses, the ecosystem of the site (malicious ads, fake download buttons, and the inherent risk of running unknown code) makes it dangerous for the average user.
Gamezfull has gained traction among budget-conscious gamers as a hub for downloading full PC games for free. However, the golden rule of the internet applies here: if you are not paying for the product, you are often the product. gamezfull es seguro