These digital entertainment products center around the theme of extraterrestrial forces threatening planetary systems. Players often assume roles as defenders, strategists, or combatants tasked with repelling the invading entities. A prime example would be a scenario where players cooperate to construct defenses against waves of alien attackers across multiple planets, culminating in a final showdown at a galactic core.
The enduring popularity of this genre stems from its capacity to deliver thrilling cooperative experiences and strategic depth. Historically, such games have provided a platform for players to test their tactical acumen and collaborative abilities in simulated crisis situations. They foster problem-solving skills and team coordination, and their evolving narratives often incorporate complex themes of survival and interspecies conflict.