Play X-com: Terror From The Deep Online

X-COM: Terror from the Deep is a turn-based strategy video game released in 1995 for MS-DOS. Developed and published by MicroProse, it is a direct sequel to X-COM: Enemy Unknown. The game is set in a science fiction future where the player manages a global military organization from a bird's-eye view perspective, tasked with defending Earth from an extraterrestrial threat emerging from the ocean depths.

The player assumes command of the revived X-COM organization, which must manage finances, research, and base construction on a global scale. Primary objectives involve intercepting alien vessels, investigating underwater terror sites, and completing tactical missions to thwart the alien agenda. Gameplay is divided between a strategic management layer, where resources are allocated and technology is developed, and turn-based tactical combat missions. These missions take place both on land and underwater, requiring the player to control a squad of soldiers in grid-based environments. Key systems include researching alien technology to develop new weapons and equipment, managing soldier experience and inventory, and engaging in tactical combat where positioning, line of sight, and action points are crucial factors.

The narrative is set forty years after the events of the first game, in the year 2040, as a new alien force begins attacking seaborne traffic and coastal cities. The aliens are conducting kidnappings and genetic experiments on humans as part of a plan to awaken a powerful leader. The player's progression is tied to successfully completing missions, securing funding from member nations, and advancing technological research to counter increasingly powerful alien forces. The visual presentation and user interface are similar to the original game, with adaptations for the aquatic setting introducing new environments and equipment suited for undersea operations.