Speedoru
Sector 1Start

SPEEDORU

AM I RIGHT?

Formula racing in a candy-colored anime world. Serious speed, questionable morals, one traffic violation at a time.

Download free Watch trailer
Free · Open source · Windows · Install guide

Launch trailer

Sector 2The idea

Not a sim. Not an arcade.

Speedoru is a game made by friends, for fun. It started as a conversation about the racing game we wanted to play and couldn't find.

Sims ask for hours of setup, an expensive wheel and an engineer's patience. Arcade racers are fun for an afternoon and then leave nothing behind. Speedoru sits in between: you can floor it in the first minute, and every corner still has something to teach you on lap ten.

Easy to pick up

The car does what you expect. No telemetry setup needed to finish a lap.

Hard to put down

Weight, grip and racing lines that reward practice. There's always a tenth to find.

Always under construction

Frequent updates with new tracks, tuning and ideas from the community.

Free and open to the community

For now Speedoru has no plans to charge. We believe in free software and support open source, so the project is open to anyone who wants to play, read the code, suggest changes and contribute.

Sector 3Developer notes

Who's in the pit box

We're Gabriel and Daniel, developers and solutions architects with many years in the industry. Our day jobs are about distributed architectures and solving complex problems with AI.

In our spare time we still enjoy writing code just for the fun of it. Speedoru is exactly that: a hobby taken seriously, built with the same care as our work and a lot more laughing.

Gabriel & Daniel
Pit laneInstall guide

Installing Speedoru on Windows

Speedoru installs like any other Windows game. Because it's a free build without a paid signing certificate, Windows asks you to confirm once or twice. This guide shows every screen you'll see and explains why it appears.

Step 1

Download the installer

Click Download at the top of this page. Your browser saves Speedoru-setup.exe straight from our GitHub Releases page, which always points to the latest version.

If your browser hesitates

Browsers sometimes flag files that few people have downloaded yet. Open the downloads panel, choose Keep, and confirm with Keep anyway if asked.

Download Speedoru
When the download finishes, open it from the browser's downloads panel.
Step 2

Run the installer

Open Speedoru-setup.exe from the downloads panel or from your Downloads folder. A blue window from Windows will most likely appear before the installer starts. That's the next step.

The first SmartScreen screen. Click More info.
Step 3

Click “Run anyway”

  1. On the blue Windows protected your PC screen, click More info.
  2. Check that the app is Speedoru-setup.exe.
  3. Click Run anyway. The installer opens.

Why does Windows show this?

The warning comes from Microsoft Defender SmartScreen. It shows up for any program that isn't signed with a code-signing certificate and hasn't yet been downloaded by enough people to build a reputation. It doesn't mean Windows found anything wrong with the file.

A code-signing certificate is the program equivalent of the padlock (TLS certificate) on a website: a certificate authority checks who the publisher is and vouches for the files they sign. These certificates cost hundreds of dollars per year and need to be renewed. Speedoru is free and open source and makes no money, so we haven't bought one yet. When we do, this step goes away.

The installer is safe, and you don't have to take our word for it:

Open sourceThe full source code is public on GitHub.
Official releasesInstallers are published only on the project's GitHub Releases page.
Check it yourselfUpload the file to VirusTotal to scan it with dozens of antivirus engines.
After More info, the Run anyway button appears. “Unknown publisher” means the file isn't signed, as explained on the left.
Step 4 · only if needed

If Smart App Control blocks it

Some Windows 11 PCs have Smart App Control turned on. It blocks unsigned programs completely, so there's no Run anyway button. You'll see Smart App Control blocked an app that may be unsafe instead. To install Speedoru, turn it off:

  1. Open Start, type Windows Security and open it.
  2. Go to App & browser control.
  3. Under Smart App Control, click Smart App Control settings.
  4. Select Off and confirm the prompt.
  5. Run Speedoru-setup.exe again and continue from step 3.
Before you turn it off

Smart App Control is a Windows security feature. On many Windows 11 versions, once it's off it can't be switched back on without resetting or reinstalling Windows. Microsoft Defender Antivirus and SmartScreen keep protecting your PC either way. Only turn it off if you're comfortable with that.

The block message. There's no way to run the file from here.
Windows Security › App & browser control › Smart App Control settings › Off.
Step 5

Finish setup and race

Follow the installer's steps and wait for it to finish. Then launch Speedoru and head out on track.

The installer copies the game files. It only takes a moment.
Step 6 · good to know

Updates install themselves

The Speedoru client downloads updates automatically. When a new version is out, it downloads it in the background, and to apply it the game may close and reopen on its own. This can happen at launch or while you're in the menus.

  • That's expected behavior, not a crash.
  • Let it finish. Don't end the process in Task Manager while an update is being installed.
  • We ship often, so you may see this every few days.
An illustration of the update flow: download, close, reopen on the new version.
Warming up the tyres…