Game entry check
Play Quake III in your browser: what we checked
A non-commercial, unofficial multiplayer port of Quake III that runs in the browser, with mobile and gamepad support according to its page.
What this page is. We fetched the entry page over HTTPS and read its title and visible text. We did not play the game, sign in, or test performance. Radiant Optimizer itself is Windows tuning software and does not provide this game.
Quick answer
Entry page opens File requirement unclear Checked October 20, 2026. Whether it plays well on your device is not verified.
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Entry pages
| Link | Status | What we saw |
|---|---|---|
| q3.pieter.com | Opens | Titled "Play Quake III Online" and labeled non-commercial and unofficial. Mentions mobile and gamepad support. |
These are third-party sites. We do not operate them and cannot vouch for their content beyond what is listed here.
What we observed
- The page calls itself a non-commercial unofficial preservation project.
- It offers "Play Now with mobile + gamepad support" and showed a live player list ("15 players online") when we read it.
What we could not confirm
- We have not played it, so latency and player counts are unverified.
- We did not confirm whether it needs game data from a copy you own.
- The page does not say whether the rights holders approve it.
Before you click
- Do not install browser extensions, run .exe files, or enter account passwords for a "browser game".
- Browser versions of 3D games usually need WebAssembly and WebGL 2. Check yours on the browser check page.
- School and work devices may block these pages. Follow your network's rules; we do not help bypass filters.
Other games we checked
- Play Black Ops Zombies in browser
- Play Skate 3 in browser
- Play Quake in browser
- Play Halo CE in browser
- Play CS Surf in browser
- Play Quake II in browser
- Play Half-Life in browser
- Play Diablo in browser
See the full game list. Looking at the software instead? Read is Radiant Optimizer legit.