X-COM: Terror from the Deep Promo Art
From the Steam store page.
Microprose official slideshow delivered with the demo version of the game.
Screenshots originally included with a downloadable non-interactive slide show which was available from the MicroProse FTP site.
Screenshots that accompanied the preview of the game published in Coming Soon Magazine Issue 3 (February 1995).
Screenshots featured in the review of the game in Coming Soon Magazine Issue 5 (April/May 1995).
Images published on the on the cover CD of the Czech gaming magazine SCORE (issue No. 20, August 1995).