Editing X-COM: Terror from the Deep (section)

==Development and release==
[[MicroProse]] wanted the developer [[Mythos Games]] to make a sequel to ''UFO: Enemy Unknown'' in six months. [[Julian Gollop]] felt that the only way to do so was to change the graphics and make minor changes to the gameplay. Eventually, MicroProse licensed Mythos' code and their internal UK studio created ''Terror from the Deep'' within a year, while Mythos Games began developing the next sequel, ''Apocalypse''.<ref name="Eurogamer Gollop Interview">{{cite web|url=http://www.eurogamer.net/articles/2010-11-28-the-story-of-x-com-interview?page=1|title=The Story of X-Com|website=Eurogamer|date=28 November 2010|access-date=28 November 2010}}</ref>

MicroProse artist Terry Greer recalled: "A decision was made to use the original engine, reskin the graphics and create a whole new story. By keeping changes to the absolute minimum a sequel could be created in just a few months. Also, by not inventing any new game features or game technology it would make the scheduling one largely led purely by asset creation – which makes it whole lot easier when it comes to estimating task durations and scheduling."<ref>{{cite web | url=http://www.terrygreer.com/xcomterrorfromthe-deep.html | title=XCOM Terror from the deep | publisher=Terry Greer | access-date=4 November 2017 }}</ref> Simultaneously with making the console port of ''Terror'', MicroProse UK also began work on their ''[[X-COM: Alliance]]'' project.

''X-COM: Terror from the Deep'' was originally released on 1 June 1995 for the PC [[DOS]]. It was ported to the [[PlayStation (console)|PlayStation]] in 1996. In 1998, a [[Windows 95]] port was released with ''Enemy Unknown'' as part of the ''X-COM Collector's Edition''.<ref name="mobygames"/> On 4 May 2007, the game was distributed on [[Steam (service)|Steam]] by [[2K Games]], who has inherited the franchise (first only for the [[Windows XP]], but a later update which enabled [[Windows Vista]] support).

The game has been re-released as part of the compilations ''X-COM Collector's Edition'' by MicroProse in 1998, ''X-COM Collection'' by [[Hasbro Interactive]] in 1999, ''X-COM: Complete Pack'' by 2K Games in 2008 and ''2K Huge Games Pack'' in 2009. The fan-created ''OpenXCom'' project, originally an improved, modernized remake of the first game, also added ''TFTD'' support which fixed a number of bugs and programming oversights in the original game, including better enemy AI.