BastionOS

BastionOS is a defense game about protecting humanity from a machine army. You select a level and aim your tower’s artillery at incoming enemies, collecting any resources they drop.

Fortify the Bastion

The tower will eventually fall, but you can rebuild it stronger under your command. Add weapons and upgrades, and research increasingly powerful technology to defend the Bastion. You and the weapons research program are humanity’s last line of defense, but whether the operation can withstand the machine horde remains uncertain.