Game description: Game description: You have come to outer space to survey, but suddenly a monster to attack your base, you have to pick up weapons to protect your base,加油吧~ by-step guide: WSAD movement, the number keys to switch weapons, G key throw grenades, after the end of each clearance below the arrow into the inside, you can upgrade weapons and defense, Search base: a base to explore, Repair wall: wall patch, Install radio: the installation of air support, radio, Build flame trap: the construction of the flame trap , Build tesla tower: the building of electromagnetic tower