
Underwater battles use the same physics as the ground ones but certain weapons cannot be used on surface/land missions. The second part, the BattleScape, is used for combat between squads of aliens and humans, and takes the form of a turn-based battle from an isometric view. The first is the real time-based GeoScape, a global view of Earth where the player views alien and X-COM craft and bases, can hire and dismiss staff, buy and sell vehicles, weaponry, ammunition and items, and build and expand bases. Just like X-COM: UFO Defense, the game consists of two parts. This is also used as a plot device all of the alien technology from the first game is unusable in salt water, forcing the player to capture and develop new technology.


X-COM: Terror from the Deep takes place mostly underwater, with base-building and combat all being submerged beneath the waves. It is a sequel to X-COM: UFO Defense and the second game of the X-COM series, this time taking the war against a renewed alien invasion into the Earth's oceans. X-COM: Terror from the Deep is a strategy video game developed and published by MicroProse for the PC in 1995 and for the PlayStation in 1996.
