Space Siege Warrior is an action game in which you play as an armored space mercenary. Fight enemies on planets and destroy their bases to earn rewards. You can kill enemies by reducing their health to zero or causing them to overheat. The temperature on each planet is different, and the higher the temperature, the more susceptible you are to overheating. Upgrading your weapons, armor, and gear with your reward money will allow you to carry out your missions more efficiently.