Factorio is a mining/manufacturing game. You start the game on an alien planet with 1 mining system and 1 furnace. Your goal is to build a spaceship with hopes of returning home. You begin building your factory from this and spread out to attain new ores, electricity output, build new items, etc. You progress through different technologies to make you factory as automated as possible. Once you start getting a large factory that is mining, smelting, and processing many different materials, you will begin to notice you are putting out a moderate amount of pollution. You are a factory man so you dont care about the environment. However, the planets natives do. They hate the smell of pollution and will attack your factory in attempts to eliminate the pollution cause. Will you build a formidable defense to protect yourself? Will you set out a counter attack to destroy the alien nests? Will you convert to a cleaner energy source? Its your choice. (I am stuck at this point, pls help) Whatever you choose, you need to get off the planet.
Multiplayer, scenarios, mods, and blueprints are all available in this game.