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For LINUX users:

You might have heard Adobe AIR is no longer supported for Linux, which this game requires.

Fear not! The game should still work on MOST* distros, you'll just need to download Adobe AIR manually.

Get Adobe AIR for Linux

And download Adobe AIR for Linux, version 2.6.0 (scroll down a bit). That should do it. If not, email us at!

For STEAM LINUX users:

See these specific instructions!

As of version 1.0.72, the TAR.GZ package contains a set of "easy installer" scripts that automates the process described on this page, including auto-installing Adobe AIR and its dependent libraries. This has been tested successfully on multiple Linux distributions -- all you have to do is unpack the archive and execute "".

The .DEB package does not contain these scripts, and due to incredibly low demand we are no longer providing RPM packages.

Specific Instructions (found this on the internet)

Step 1: Download AIR 2.6 from here.

Step 2: Sometimes there's an issue installing AIR.

"Sorry, an error has occured. Adobe AIR could not be installed. Install either Gnome Keyring or KDE KWallet before installing Adobe AIR."

Step 3: This can be fixed by installing Gnome Keyring or KDE KWallet:

Terminal, Ctrl+Alt+T - locate - (locate

This is my result (yours might be different):


Create a symbolic link to your location strings that you found with the previous commands:

sudo ln -s /usr/lib/x86_64-linux-gnu/ /usr/lib/
sudo ln -s /usr/lib/x86_64-linux-gnu/ /usr/lib/

Use following commands for 32-bit systems:

sudo ln -s /usr/lib/i386-linux-gnu/ /usr/lib/
sudo ln -s /usr/lib/i386-linux-gnu/ /usr/lib/

Remove symbolic links after installation of Adobe AIR 2.6.0:

sudo rm /usr/lib/
sudo rm /usr/lib/

Step 4: Open a terminal in the download folder. Then:

chmod +x AdobeAIRInstaller.bin

Step 5: run AdobeAIRInstaller.bin

Step 6: open the .deb file in your favorite package manager.

Step 7: Enjoy Defender's Quest!

Although most Linux users have been able to get the game to run, we've had some reports that some people have trouble installing Adobe AIR 2.6.0 on certain distros (Gentoo, specifically).

We HIGHLY recommend that before purchasing the game, make sure the linux demo works on your system. If it doesn't, send an email to and tell us what's happening. We want to support as many linux distros as possible even though Adobe has made this difficult for us.

If you are completely unable to run Defender's Quest on the linux distribution of your choice, email and we will cheerfully refund your purchase.

Our future games will be developed with Haxe/OpenFL so that we can get true native support for Linux without having to mess with this junk.