tftd

TFTD, short for Terror from the Deep, is a tactical strategy video game released in the early 1990s by MicroProse as a stand-alone sequel to UFO Defense (X-COM: UFO Defense). It continues the X-COM premise of humanity defending itself against an alien invader by managing bases, researching new technologies, manufacturing equipment, and engaging in turn-based ground combat on grid maps. A defining feature of TFTD is the introduction of underwater environments, expanding the range of mission types beyond terrestrial incursions.

Gameplay follows the familiar X-COM framework: strategic layer management of bases, facilities, and resources, paired with a strategic research tree that unlocks new weapons and equipment. The tactical combat remains grid-based and turn-driven, using time units to regulate actions and unit progression. TFTD adds new alien species and devices, and introduces underwater gear and submersible craft to address aquatic operations, requiring players to adapt tactics for submerged encounters.

The game was released for PC (DOS) and Amiga, with later ports to other platforms. It preserves much of the original's interface and engine, making it accessible to players familiar with UFO Defense while offering distinct challenges and atmosphere. Reception at the time highlighted its creative shift toward underwater warfare and its mood, though some critics noted a steeper learning curve and higher difficulty compared to the predecessor. Over time TFTD has been recognized as a distinctive entry in the X-COM series, contributing to its reputation for blending science fiction with cosmic horror elements and enhancing the series’ thematic range.