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Onuru Sigma is a cold, icy world situated in or near the Koprulu Sector.

At some point alien life was apparently on the world, leaving behind a ruined city seemingly not built by terrans.

The planet, settled by Kel-Morian Combine miners seeking the vespene gas deposits at Noranda Glacier, established itself in human history as being the first battleground of the Guild Wars.[1]



  1. McNeill, Graham (December 30, 2008). StarCraft: I, Mengsk. Simon & Schuster (Pocket Star). ISBN 1416-55083-6.