A lonely cabin in the woods addon - Red Faction

You are Parker, a weary miner who works for the corrupt Ultor Corporation. You reside on Mars, sometime in the future, and when a plague spreads through the mining community, some of the Ultor employees uncover a massive conspiracy. Thus ensues a battle by a group of lowly workers, headed up by the educated Parker, to expose the deadly experiments Ultor has unleashed onto its work force.