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.
After a long hiatus, we present to you the sequel to our previous game Operation SD: Space Defense.Jan 12, 2014 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 regularly or subscribe to our RSS feed. If you...Aug 7, 2013 News
"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, friendlier UI design, better introduction CGs, more...Jul 1, 2013 News
If you're having a problem finishing a stage in Operation SD, just remember the following general tips and tricks.Apr 23, 2012 Article
Thrust into mankind's first interplanetary war between the Earth Alliance and the Ares Confederation.Apr 9, 2012 News