The game is part real time, and part turn-based. This game is set decades after the first Alien War is one and this time the world is menaced by a new alien species, this time from the depths of the oceans - this games seems to be the first strategy game set in the underwater. This is the second game in this great series of sci-fi strategy games and its prequel is X-Com: UFO Defense. But it sure is highly playable still,a nd offers a plethora of fun missions, all within a well put together scenario. The attacks are signaled on the Globe interface, and they are randomized thus, you can end up with a lot of enemies going at you, which, in the beginning is not that nice! All in all, graphically, X-COM: Terror from the Deep looks similar to X-COM: Apocalypse, yet with less graphical detail. The other portion is based on fighting, squad based, heavy in cover and with a good choice of weapons and strategies. X-COM: Terror from the Deep continues the alien invasion saga, but, by this time, the invaders, have but conquered the bottom of the ocean, from where they plan to attack and give us hell! However, the human race is not without its saviors the humans, represented by your squad have organized, and, basically there are two main game modes one is a strategic mode, that allows you to research, build and upgrade your base you can even research the alien technology and have it used by the human race. When the alien enemy comes from the ocean!

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