“You can’t outrun them, you can’t destroy them. If you damage them the essence of what they are remains; they regenerate and keep coming. Eventually you will weaken, your reserves will be gone… They are relentless.”
— Q
The Borg can imperil the game in two ways. Players will encounter the Borg while exploring the Galaxy; a ship may discover a Borg Cube when they explore a new system or they may discover an entire planet that has already been assimilated by the Borg. Or players may start the game with the Borg invading the Alpha Quadrant by placing the Transwarp Hub System Disc in play. Each turn, a Borg Cube may emerge from the Transwarp Hub and attempt to assimilate players and neutral civilizations. Any System 
assimilated by the Borg will begin to build new Borg Cubes!
The Borg are an independent menace, attacking players’ ships and assimilating civilized worlds. If the Borg are not dealt with, they could overwhelm the Galaxy. Can the great civilizations put aside their rivalries long enough to face the Borg as a united front? Or will they try to combat the Borg onslaught individually, seizing Borg technology for themselves? Available here.