Protocol Xeno

Protocol Xeno is about defending Earth after it is suddenly thrust into the center of a galactic warzone. You build defenses and divide your attention between fighting the aliens and spending resources. The aliens grow stronger over time, so you must hold them off for as long as you can.

Fight and build

You can build weapons larger than mountains to fight aliens the size of planets. You can also crush aliens with the moon or overwhelm them with extreme partying, but the aliens will continue to grow stronger.

Resources and survival

You choose how to spend your resources on upgrades, and those choices can determine whether you die quickly or survive. The challenge increases the longer you last. When Earth shatters, the run ends, and you start again, using the knowledge and skills you gained.

High scores

You can aim for high scores by acting fast and giving the aliens no respite.