Fortified Key

Fortified is an explosive strategic shooter in which players will defend Earth from a threatening Martian invasion in the 1950s. Play as one of the four heroes inspired by Pulp, who fights swarms of terrifying robots with an arsenal of weapons and experimental technology from Cold War era.
Protect the city by building a network of defensive structures, commanding an army and jumping into battle against dangerous attackers scratching the sky. Fight for Earth alone or with up to four players for the best cooperative defense experience.