Best free VPN with choosing country which works on OS

Hi, I’m looking for VPN or any solution that will help me change localization to specific country in a game on pc, so it has to work on whole OS, not just browser. I would like to do that just once because i want to buy currency which is much cheaper in different country, so free vpn or vpn with free first month would be the best. thank you

Mullvad or Proton. Everyone else has lost their trust