Horizons Free

It is the year 3126 and the Earth has all but been eradicated. However, the Human race has since populated the planet Horizons III, far outside the Universe that Humankind has known in the past. Recently, the planet has come under attack from a race of human mutants known as Kluxmans. Your mission is to defend Horizons III from attacks from these mutants and protect what remains of the Human race.