Set in the year SE 3256, the player is thrust into mankind's first interplanetary war between the Earth Alliance and the Ares Confederation. As the promising captain of the experimental dreadnought prototype, codenamed Sierra. Your sole objective is to help turn the tides of the war, utilizing the ship's advanced combat systems, flexible energy allocation and optimized platform deployment capabilities. To the captain, the core principles of prudence, guile, resource management and patience are essential to survival. The technology incorporated in Sierra allows it to explore multiple paths to victory: evade and assault enemy ships in classic broadside warfare; research armaments and upgrades to outgun the enemy fleet; or outnumber them with remotely-controlled weapon platforms. Rout the enemy’s armada in order to quell the rebellion and save Earth from the corrupt colonials.

  • View media
  • View media
  • View media
  • View media
  • View media
  • View media
RSS Articles

Hello everyone,

Sierra Ops Episode 2 has been finally released!

You can try Episode 1 for free on Steam : Store.steampowered.com

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

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 (Discord.gg) where we can communicate directly!

Cheers,

Jason @ Innomen Team

Sierra Ops stable v1.05 update on Steam!

Sierra Ops stable v1.05 update on Steam!

News

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

Operation SD: Space Defense Rebuild August Update

Operation SD: Space Defense Rebuild August Update

News

We have finally opened our website where updated content will be posted two to five times a week. If you wish to track our detailed progress, simply visit...

Operation SD: Space Defense Rebuild Progress

Operation SD: Space Defense Rebuild Progress

News 2 comments

"Sierra Ops" is the new title of our old release, Operation SD: Space Defense. It will contain new features such as discussion and briefing cut scenes...

Operation SD: Space Defense Released on Desura

Operation SD: Space Defense Released on Desura

News

Thrust into mankind's first interplanetary war between the Earth Alliance and the Ares Confederation.

RSS Files
Operation SD (demo)

Operation SD (demo)

Demo 1 comment

Press "read more" for instructions on how to play the game.

Comments  (0 - 10 of 59)
helrouis Creator
helrouis

Feel free to support the development of Sierra Ops by buying the Season Pass!
Store.steampowered.com

Reply Good karma+1 vote
helrouis Creator
helrouis

You can download the game here: Helrouis.itch.io

Reply Good karma+1 vote
liamdawe
liamdawe

Looks awesome, any chance of a Linux version? Can give it a shout out on Gamingonlinux.com

Reply Good karma Bad karma+2 votes
Kalus Creator
Kalus

Sierra Ops, the Operation SD Rebuild is being made in Unity, So yes a Linux release is indeed planned.

Reply Good karma+2 votes
liamdawe
liamdawe

I read the post in the news section but it's a bit confusing, so you are re-building the game in Unity and it will support Linux? Is that about right?

Reply Good karma Bad karma+2 votes
Kalus Creator
Kalus

Yep, that is correct.

Reply Good karma+3 votes
Watsong
Watsong

Very good game! I enjoyed it a lot! Great music, gameplay and graphics. Looking forward to the forthcoming overhaul. This game reminds me of the Japanese game "Liberation Army".

Reply Good karma Bad karma+3 votes
Kalus Creator
Kalus

Thanks, I did get some inspiration from Liberation Army too. XD

Reply Good karma+2 votes
SERgius
SERgius

Hey there. I just bought this game recently after playing the demo.(worth every penny =) ) But now i got this error that i can't solve.

Reply Good karma Bad karma+3 votes
Kalus Creator
Kalus

Hello, can you tell me any other details about the error you encountered? You can do this by checking the errorlog.txt file inside the Content folder where Operation : SD is installed. thanks

Reply Good karma+2 votes
SERgius
SERgius

Sure. Here is a part of it

7/9/2013 12:48:49 AM : System.IO.FileNotFoundException: Could not find the file C:\Users\Owner\Documents/Innomen Productions/Operation SD/ShipDataFile but found the directory c:/users/owner/documents/innomen productions/operation sd/ Did you type in the name of the file wrong?

Reply Good karma Bad karma+2 votes
Kalus Creator
Kalus

Go to C:\Users\Owner\Documents/Innomen Productions/Operation SD/ folder and check if the ShipDataFile is present there.

If not, go back to where Operation:SD was installed and go to Content/Databases/ folder and copy the ShipDataFile from there.

You might also want to copy the MissionDatabase.csv file from the Content/GlobalContent/ Folder if the said file is not yet present in the operation sd save directory.

Alternatively, you can run the OPSDSettings.exe (it might give an error, just press continue) and press the ResetSaveData button.

Reply Good karma+2 votes
SERgius
SERgius

Ok So The game finally running but i ran into error. The game started with half the screen showing and then it close. I check the error report and this is what i got.

System.NullReferenceException: Object reference not set to an instance of an object.

Reply Good karma Bad karma+2 votes
Kalus Creator
Kalus

That is odd. Try re-installing the game to see if it fixes things up. The error indicates it cannot load/find certain resources. Also are you installing the game from the stand alone build or the Desura build?

I also seem to have the half screen problem where the videos are supposed to play. I suspect an XNA problem seeing as we made the game on XNA 3.1 it probably didn't aged well. You can still access the tutorial videos inside the Content/Transitions folder as wmv files.

Reply Good karma+2 votes
SERgius
SERgius

I got from the desura Build. and I also tryed re-installing several time, but it still having that same bug.. plus i don't seem to have that transtion folder of any sort.

Reply Good karma Bad karma+2 votes
Kalus Creator
Kalus

Hmmm, if you don't see the Transitions folder inside the Content folder then something must have gone wrong with the downloading/installing process.

Also, there should be 3 files inside the Operation SD savedata folder (the one inside your documents folder) namely ShipDataFile, MissionDatabse.csv and ErrorLog.txt.

if you see all of them there and you still have an error then try downloading standalone version. I tried installing via Desura on my end and it worked out just fine so I am quite stumped at the moment on what the problem on your end is XD.

Reply Good karma+2 votes
SERgius
SERgius

Uh right. where to find taht stand alone version...
XD

Reply Good karma Bad karma+2 votes
Kalus Creator
Kalus

try going to this link.

Indiedb.com

Reply Good karma+2 votes
SERgius
SERgius

Thank you. the game is finally running but the small videos still have that half a screen thing. everything else is fine.

Reply Good karma Bad karma+2 votes
Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.