Usually it adds a network hop and can increase latency. Test it against a direct connection for the specific game and route.
How to use a VPN on SteamOS
A VPN on SteamOS is useful only after the base connection works. It can protect traffic on an untrusted network or change the route between your device and an online service, but it will not repair a bad Wi-Fi signal, make an unsupported game compatible, or solve anti-cheat restrictions. Start by deciding what problem you are actually trying to solve.
For the full connection-triage order before changing another setting, use Internet Not Working.
Check SteamOS compatibility before installing anything
When this affects the next part of the task, use SteamOS Desktop Mode to keep the check specific.
SteamOS is Linux-based, but Linux support is not one universal target. Check whether your provider explicitly supports SteamOS or the Arch-based environment it uses, and whether it supplies an install path that fits the current device. Do not assume that an Ubuntu or Debian package will install or stay reliable on SteamOS.
For example, VPN Unlimited documents a Linux application and its settings, but its current download page lists Ubuntu, Debian, Mint, and Zorin releases rather than SteamOS. Treat that as a reason to confirm compatibility with support before attempting an installation.
Set up the network first
Confirm the ordinary connection
Connect to Wi-Fi in Steam > Settings > Internet, then make sure the Steam Store and a normal web page work before adding a VPN. If they do not, work through Wi-Fi, router, DNS, or Steam service status first. A VPN adds another connection stage, which makes a vague failure harder to diagnose.
Use Desktop Mode only when the provider supports it
Switch to Desktop Mode from Steam > Power when the provider offers a documented Linux setup. Follow the provider's supported method rather than copying commands intended for a different distribution. Keep a note of how to disconnect or undo the configuration before you start.
Connect and test one change at a time
After connecting, test three things: can you still reach the web, can Steam sign in, and can the game or service you care about connect? Then disconnect and repeat the same test. This simple comparison identifies whether the VPN is part of the problem.
VPN Unlimited's Linux guide describes server selection, a Ping Test, protocol selection, an automatic Optimal protocol option, trusted networks, and customized DNS. Those are reasonable controls to evaluate where the application is supported. A lower server ping can be a useful selection signal, but it does not guarantee lower game latency.
Troubleshoot the VPN separately from SteamOS
Internet fails only while the VPN is connected
Disconnect first. If access returns, try another server and then another supported protocol. Check for overlapping VPN clients or network tools. VPN Unlimited's troubleshooting guidance also recommends re-establishing the connection and contacting support when a connection issue persists.
Steam or one game still fails
Test without the VPN. A game-specific failure can be a server outage, game compatibility limitation, anti-cheat issue, or local network problem. Keep the diagnosis narrow instead of changing DNS, Wi-Fi, Proton settings, and VPN settings all at once.
What a VPN cannot do on SteamOS
A VPN does not grant a game Proton or anti-cheat support, fix a poor wireless signal, or change the rules that govern a Steam account. Valve's Subscriber Agreement prohibits using IP proxying to disguise residence to circumvent geographic restrictions or pricing. Use the service within the provider's and platform's terms.