Bioweapon addon

On a distant planet, LV 263, the Weyland-Yutani Corporation has established a mining and research facility. The planet's rich mineral deposits made it an ideal source for scientific development. However, the mineral mining facility has simply been a front for public and military eyes. In truth, the Yutani Corporation has discovered a subterranean xenomorph hive on the planet, and constructed the facility to gain access to the hive and conduct experimental research. Now, during one of the most critical experiments, the facility has suffered a power loss. Something has gone wrong. Unable to mount a timely investigation themselves, the Yutani Corporation has asked the marines to investigate the situation. So, after arriving to the planet by dropship, your marine team has set course for the mining facility via APC. Just another routine mission to restore communications at a mineral mining facility and clean up after the Yutani Corporation again.....or so you thought.