Fortified is an explosive strategy shooter set in an alternate 1950s where Earth must repel a menacing Martian invasion. Play as one of four pulp‑inspired heroes - from a jetpack‑flying heroine and a shotgun‑wielding space cowboy to a covert government agent and a battle‑hardened Marine captain - and blast through swarms of towering robotic invaders using Cold War‑era weapons and cutting‑edge experimental technology.