Borea is a Terran Dominion colony. It has a snowy climate, with a large number of canyons and mountains dotting its terrain.
After Agent Nova Terra escaped from a Defenders of Man facility, she was picked up by a Dominion battlecruiser and taken to the Borean base. There, she met Admiral Matt Horner, who informed her that she had been missing for months, and was wanted for treason for her connection to the Defenders of Man. Just then however, feral zerg attacked the base, led to the planet by a Defenders of Man psi emitter.
Nova was given a chance to show she could be trusted, and took reapers to the hills to defend the base from zerg attacks. Using the canyons, she was able to destroy the zerg as they came through and before they could destroy Horner's base. During the assault. Swann's research base and experimental weapons lab came under attack.
The defense was successful, however Valerian's battlecruisers did not arrive. Instead the Defenders of Man attacked the zerg, telling the people of Borea the Dominion had failed them, and that the Defenders of Man would protect them. They then contacted the Dominion, demanding they give up Nova and leave. Horner and Nova used the chaos of the battle to escape the planet before the Defenders of Man came for them.
After their rescue, the Defenders of Man received a surge of volunteers from the planet.
The planet's name is possibly a reference to the term "Boreal"; usually used in conjunction with Arctic ecosystems and flora
- Blizzard Entertainment. StarCraft II. (Activision Blizzard). PC. Mission: Nova Covert Ops, Sudden Strike (in English). 2016-03-29.
- Blizzard Entertainment. StarCraft II: Nova Covert Ops. (Activision Blizzard). PC. Cinematic: Loyalty and Service. (in English). 2016.
- Blizzard Entertainment. StarCraft II. (Activision Blizzard). PC. Mission: Nova Covert Ops, Enemy Intelligence (in English). 2016-03-29.