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.

Members Watching  (0 - 50 of 131)
Avatar

Philippines Piemanlives

Online 5 minutes ago Joined Nov 22, 2009
Avatar

Germany schwarzwolf

Online 24 minutes ago Joined Aug 23, 2012
Avatar

France Typhonarick

Online 40 minutes ago Joined Dec 29, 2009
Avatar

United States Vithar-133

Online 46 minutes ago Joined Jan 2, 2009
Avatar

Brazil BioDestroyer

Online 1 hour ago Joined May 12, 2009
Avatar

Antarctica Nergal01

Online 2 hours ago Joined Jul 24, 2012
Avatar

Germany Shaori

Online 2 hours ago Joined Jun 2, 2011
Avatar

Canada crisher888

Online 3 hours ago Joined Jan 25, 2012
Avatar

Germany wolf_skirata

Online 5 hours ago Joined Apr 5, 2011
Avatar

Australia anger_muffin

Online 9 hours ago Joined Jun 18, 2009
Avatar

Sweden RumpNissen

Online 11 hours ago Joined Feb 18, 2006
Avatar

United States maceman

Online 12 hours ago Joined Jan 8, 2008
Avatar

United States Commitsar

Online 13 hours ago Joined Feb 19, 2012
Avatar

United States theshodan

Online 20 hours ago Joined Aug 22, 2006
Avatar

United States InbatElendil2

Online 21 hours ago Joined Mar 7, 2011
Avatar

United States ATTACK1942

Online 1 day ago Joined Jun 21, 2007
Avatar

Finland Reactorcore

Online 1 day ago Joined Nov 11, 2006
Avatar

United Kingdom WhitePhoenix

Online 4 days ago Joined Sep 28, 2011
Avatar

Germany HaThin

Online 5 days ago Joined Sep 3, 2006
Avatar

United States PenultimatePanda

Online 5 days ago Joined Nov 23, 2011
Avatar

United States Zaiketsu

Online 5 days ago Joined Oct 10, 2010
Avatar

Australia 0kensai0

Online 1 week ago Joined Nov 12, 2007
Avatar

France Kiviran

Online 1 week ago Joined Sep 3, 2010
Avatar

India arun23

Online 1 week ago Joined Jun 21, 2010
Avatar

Mexico Lorflord

Online 1 week ago Joined Jan 22, 2010
Avatar

Germany m0nster

Online 1 week ago Joined Nov 10, 2007
Avatar

United States chillinwater

Online 1 week ago Joined Mar 2, 2013
Avatar

Thailand BeWarn

Online 2 weeks ago Joined Jul 13, 2008
Avatar

United States Pucokue

Online 2 weeks ago Joined May 3, 2010
Avatar

United States pczelda

Online 3 weeks ago Joined Feb 17, 2011
Avatar

Philippines helrouis

Online 1 month ago Joined Apr 23, 2013
Avatar

United States cyxceven

Online 1 month ago Joined Apr 3, 2012
Avatar

Poland cyberkiller40

Online 2 months ago Joined Oct 30, 2011
Avatar

France Rayman51

Online 2 months ago Joined Aug 13, 2009
Avatar

Canada a2omega

Online 2 months ago Joined Sep 2, 2011
Avatar

United States HounderKnight

Online 3 months ago Joined Aug 14, 2006
Avatar

United States MrChocolateBear

Online 3 months ago Joined Jun 29, 2009
Avatar

Mexico Khrizto

Online 3 months ago Joined Mar 18, 2012
Avatar

Chile o0Sidewinder0o

Online 4 months ago Joined Apr 22, 2011
Avatar

United States der_dude_1

Online 6 months ago Joined Jul 14, 2013
Avatar

Germany burningstar80

Online 6 months ago Joined Sep 30, 2006
Avatar

United States NEXUS114

Online 7 months ago Joined Sep 18, 2011
Avatar

Sweden Slobboban

Online 7 months ago Joined May 15, 2012
Avatar

United States XripX

Online 7 months ago Joined Sep 30, 2009
Avatar

Australia Mork2

Online 8 months ago Joined Nov 7, 2011
Avatar

New Zealand fanqloveyan

Online 8 months ago Joined Sep 3, 2011
Avatar

United Kingdom Madman4700

Online 8 months ago Joined Dec 26, 2008
Avatar

Australia marcoasibal

Online 10 months ago Joined Jun 13, 2012
Avatar

Canada DKDevil

Online 1 year ago Joined Jul 19, 2013
Avatar

Italy SetoKonowa!

Online 1 year ago Joined May 24, 2012
Icon
Operation SD: Space Defense
Platform
Windows
Developer & Publisher
InnoMen Productions
Engine
Custom Built
Contact
Send Message
Official Page
Innomenpro.com
Release Date
Released 2012
Game Watch
Track this game
Member Statistics
Members
131
Online
1
Views
210,923
Views Today
129
Last Online
Piemanlives
Piemanlives Online 5 minutes ago
schwarzwolf Online 24 minutes ago
Typhonarick Online 40 minutes ago
Vithar-133
Vithar-133 Online 46 minutes ago
BioDestroyer
BioDestroyer Online 1 hour ago
Nergal01
Nergal01 Online 2 hours ago
Shaori
Shaori Online 2 hours ago
crisher888 Online 3 hours ago
wolf_skirata
wolf_skirata Online 5 hours ago
anger_muffin
anger_muffin Online 9 hours ago
RumpNissen Online 11 hours ago
maceman
maceman Online 12 hours ago
Commitsar
Commitsar Online 13 hours ago
theshodan
theshodan Online 20 hours ago
InbatElendil2 Online 21 hours ago