Alternative Factorio, slightly changed rules, primarly to be more scientifically correct. Mass storage building, substations have a large supply area, new chemical ammonium nitrate, more use for wood, charcoal recipe, sulphur is gained from oil and coal instead of gas. Additionally makes building up and planning in the earlier stages easier. Don't use on existing savefiles, mixing with other technology tree changing mods will probably make the game unplayable.
Small changes concerning balance, gameplay, or graphics.