A downloadable game for Windows, macOS, and Linux

Buy Now$6.99 USD or more

Galactic hero Serena S has been insulted on Spacebook. This is obviously a cause to embark on an epic quest to punish the troll in question, who just happens to be The Space Prince. Guide Serena through 7 stages of shmup action, jumping, shooting, and yet decidedly more jumping and shooting to her ultimate goal of total testicular annihilation of her foe. Ultionus is a love-letter to the home computer arcade games of the late 80s and early 90s, particularly Halloween Harry, Astro Marine Corps, Duke Nukem 2 and especially Phantis/Game Over II. The game features tons of lovingly crafted pixel art, and a rockin' chiptune soundtrack by the legendary Jake 'Virt' Kaufman.

PlatformsWindows, macOS, Linux
Release date Feb 25, 2014
Average sessionA few hours
InputsKeyboard, Xbox controller, Gamepad (any), Joystick


Buy Now$6.99 USD or more

In order to download this game you must purchase it at or above the minimum price of $6.99 USD. Your purchase comes with a Steam key. You will get access to the following files:

Ultionus_RC3D_Win.zip 57 MB
Ultionus_RC3D_Linux.zip 57 MB

Download demo

Ultionus_Win_DEMO.zip 30 MB
Ultionus_OSX_DEMO.app.zip 34 MB
Ultionus_Ubuntu_DEMO.zip 30 MB


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This game looks great. I just tried the demo and I could not get the game to recognize my Logitech F310 Wire USB Gamepad. I'm on Ubuntu Mate 16.04.3 LTS if that helps. Other than that the game works great. Once the gamepad is working 100% it's a solid purchase from me.

Unfortunately the controller support is a bit spotty, especially on non-Windows platforms, and there is very little I can do to help. People who came up with ways of emulating the 360 pad under Linux were able to get their controllers to work, but not being a Linux guy, I wouldn't be able to say how.

I have long been working on an update to the game that may solve this issue, as well as a whole bunch of other ones (60 fps, larger play window, optional 4:3 mode, turbo-speed, better controller support, redefine keys menu, better game balance etc). Hopefully I'll be able to release it sometime soon.

Those updates sound good. The workaround I've found is using AntiMicro to remap the keyboard keys to my pad but it would make the game harder to play for my HTPC setup. I'll look forward to the update.