After nearly decimating all of mankind over three centuries ago, humanity looked to the stars to rebuild their past glory. With the invention of terraforming technology, self-sustaining, man-made ecosystems and reliable space travel, large off-planet colonies and mining posts were soon established to feed the ever-growing human population. The power of the human race grew. However, with power comes corruption. With corruption comes imbalance. With imbalance comes unrest. With unrest comes war.

Play as Captain Junius Fahrenheit, a soldier of the United Terran Vanguard onboard the state-of-the-art ship, the Sierra, as him and his crew are thrown into humanity’s first interplanetary war. Tasked to protect Earth and free its colonies from under the Ares Confederacy of Mars’ grasp, there’s no question that he must fight to protect everything he stands for…

But what exactly is it he stands for? Who is right? Who is wrong? Does it even matter?

Perhaps there’s more to this than meets the eye.

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Hello everyone,

Sierra Ops Episode 2 has been finally released!

You can try Episode 1 for free on Steam :

or buy the Season Pass and save 40% for all Episodes 2, 3 and 4!

Please note that Episodes 3 and 4 are still under development.

Episode 1 improvements

The Beerkelium

The following changes and improvements were made to Episode 1 before Episode 2 was released:

  1. Added x0.5 - x1 - x2 battle speed toggles on top.
  2. Added a proper Beerkelium CG in Rhines mission (early arrival variation).
  3. Properly directed tutorial nightmare, and updated nightmare CG which now shows a bit more information.
  4. Removed difficulty system, instead we'll have up to three modifiers for main missions and a few select stages depending on side quests you've taken.
  5. for Episode 1 - only a sample preview of this can be seen in the tutorial nightmare.
  6. Added voices to Martian Admiral’s speech, thanks to Patrick M. Seymour!
  7. CG Gallery is now accessible in the main menu.
  8. Improved visuals in a section where Junius was going through each colony one by one upon entering Terra System.

What's new in episode 2 (no spoilers)

Breaks System

Episode 2 has about 120k words, several times longer than episode 1 with lots of new gameplay mechanics and six character routes to go for! We sincerely hope you enjoy what Sierra Ops has to offer, and we highly recommend going in blind, and maybe consider replaying from Episode 1 to see all the improvements :D

Scene with two of Sierra Ops' backers.

Thanks to all backers who supported us all the way, as well as newcomers to the series who bought the Season Pass and shared Sierra Ops to their friends! Special shoutout to Arraxis and Dee for keeping us around in Hyperspace Discord, and to SullenFrog for being SPEED, updating our TV Tropes page as soon as Episode 2 was released!

To get more updates, follow us on Twitter (@sierralunabot). We also now have a Discord server ( where we can communicate directly!


Jason @ Innomen Team

Sierra Ops on Steam

Sierra Ops on Steam


Sierra Ops Steam release on January 15, 2020, please support us!

Sierra Ops stable v1.05 update on Steam!

Sierra Ops stable v1.05 update on Steam!


Massive improvement to gameplay graphics, UI, and fixed all achievements. Also a few previews for Episode 2 progress.

Sierra Ops Demo Available

Sierra Ops Demo Available


Sierra Ops Prologue chapter is now available, showcasing the Visual Novel feature.

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Sierra Ops Prologue Demo

Sierra Ops Prologue Demo


The demo for Sierra Ops, covering the prologue chapter and some test battles. The demo showcases/focuses on the Visual Novel aspect.

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