Play as Captain Junius Fahrenheit, a soldier of the UTV onboard the state-of-the-art ship, the Sierra, as him and his crew are thrown into humanity’s first interplanetary war.
All Reviews:
Positive (41) - 80% of the 41 user reviews for this game are positive.
Release Date:
Jan 16, 2020

Sign in to add this item to your wishlist, follow it, or mark it as not interested

Check out the entire InnoMen Productions franchise on Steam

Pre-Purchase Offer

Thank you very much!

As one of the first Visual Novels to have successfully passed Steam Greenlight, we're very thankful and happy to say that none of this would have been possible if not for our friends, backers, the Steam community, and everyone who supported us through the years of game development hell!

In celebration of the release of Sierra Ops, not only are we offering the entirety of Episode 1 for free (40, 000 words), we are offering a Season Pass for a 40% discount compared to buying each episode individually!

About This Game

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.

Game Features

  • Based on the indie game OPSD: Operation Space Defense
  • Real-time strategic gameplay
  • 1080p visuals
  • Over 500,000 words split over four episodes, ten main story chapters, and twenty side quests
  • Ship and loadout customization

  • You only have so much time to act! Your decision of which missions to pursue and combat performance determine the state of the war and its survivors. Taking one opportunity is closing another!
  • Six characters to befriend one on one... maybe it’ll lead to romance?
  • Elaborate relationship system where your actions impact how deep your friendship runs
  • Wibbly wobbly weird stuff! (Not guaranteed)

System Requirements

    • OS: Windows XP+
    • Processor: SSE2 instruction set support.
    • Memory: 2 GB RAM
    • Graphics: Graphics card: DX9 (shader model 2.0) capabilities; generally everything made since 2004 should work.
    • DirectX: Version 9.0
    • Storage: 2 GB available space

More from InnoMen Productions

Customer reviews

Review Type

Purchase Type


Date Range
To view reviews within a date range, please click and drag a selection on a graph above or click on a specific bar.

Show graph

Filter reviews by the user's playtime when the review was written:

No minimum to No maximum
Display As:
Show graph
Hide graph
Excluding Off-topic Review Activity
There are no more reviews that match the filters set above
Adjust the filters above to see other reviews
Loading reviews...