XCOM

XCOM is a turn-based tactical strategy series launched by Julian and Nick Gollop in 1994 as UFO: Enemy Unknown / X-COM: UFO Defense. Players manage the XCOM organisation's global campaign against an alien invasion while commanding small squads of soldiers in turn-based combat with brutal permadeath — Ranger dies on turn 3 and stays dead. Firaxis's 2012 reboot XCOM: Enemy Unknown and 2016 sequel XCOM 2 brought the series back to prominence.