Enemy Unknown | Ufo:

Destroying the Alien Brain severs the link between the invaders and their leadership, causing the alien forces on Earth to collapse and saving humanity.

The ultimate goal is to destroy the Alien Brain , a massive bio-computer that serves as the mastermind and central hub for the invasion. The Endings UFO: Enemy Unknown

Interrogating high-ranking alien captives reveals that the various species are being manipulated by a master race. The Revelation Destroying the Alien Brain severs the link between

In the original 1994 game (released in North America as X-COM: UFO Defense ), the story unfolds through a mix of scripted events and emergent gameplay as you lead a secret paramilitary organization defending Earth from an extraterrestrial threat. The Outbreak (1998) The Revelation In the original 1994 game (released

As the Commander, you start with basic human ballistics while fighting various alien species, such as the physically frail but psionic and the brutish Mutons . The "story" is largely driven by your research:

The story continues in X-COM: Terror from the Deep , where a second wave of aliens awakens from the ocean floor.

You discover that alien technology relies on Elerium-115 , a stable heavy element not found on Earth, which becomes the most vital resource for humanity's advanced crafts and weapons.