Steam on Zorin OS 18: A Gaming Optimization Guide

Set up Steam on Zorin OS 18 the right way — install Proton, tune GPU drivers, and benchmark your rig for smooth Linux gaming. A technical guide from OrcStar.

Zorin OS 18 is one of the friendliest Linux distributions for a gaming daily-driver: Ubuntu 24.04 underneath, a polished desktop on top, and enough out-of-the-box hardware support that most modern rigs boot straight into a working system. With a bit of setup, Steam plus Proton runs a huge share of the Windows Steam catalog at near-native speed. This guide walks through everything OrcStar does when we ship a custom build with Zorin OS 18.

1. Install Steam and enable Proton

Zorin ships a curated software store. Open Software, search for Steam, and install the Flatpak build for the cleanest sandboxing. Launch Steam, sign in, then open Steam → Settings → Compatibility and turn on Enable Steam Play for all other titles. Pick the latest Proton (or Proton Experimental) — this is the compatibility layer that lets Windows-only games run on Linux.

Check ProtonDB before installing a specific title. Games rated Gold or Platinum work out of the box; Silver usually needs a launch option, which ProtonDB spells out.

2. Update GPU drivers

NVIDIA: open Software & Updates → Additional Drivers and pick the newest proprietary driver marked tested. Reboot. For RTX 40- and 50-series cards prefer the 550+ series driver so DLSS, ray tracing, and Wayland work correctly.

AMD: nothing to install. The Mesa RADV Vulkan driver that ships with Zorin 18 is the fastest option and gets a fresh version with each Ubuntu HWE stack update. Keep the system up to date and you are done.

3. Turn on shader pre-caching and gamemode

In Steam, enable Settings → Downloads → Shader pre-caching. Zorin can then compile Vulkan shaders during downloads, which kills most of the first-run stutter people blame on Proton.

Install gamemode from the Software store and prefix demanding titles with gamemoderun %command% in the game's launch options. Feral's gamemode pins the CPU governor to performance and gives the process a higher I/O priority while a game is running.

4. Benchmark your setup

Install mangohud to get an in-game overlay of FPS, frame times, and GPU/CPU temps. Add mangohud %command% to a game's launch options and compare a Windows benchmark run (from YouTube or TechPowerUp) to your own results on the same settings. Modern Proton runs Cyberpunk 2077, Elden Ring, and Baldur's Gate 3 within a few percent of Windows on identical hardware.

5. Skip anti-cheat headaches

A handful of competitive titles (Valorant, Fortnite's Battle Royale mode, some EA FC releases) ship kernel-level anti-cheat that publishers have not enabled for Linux. ProtonDB tags these asborked. If your library is mostly those games, keep a Windows dual-boot; otherwise the rest of Steam is fair game.