The intellectual property rights to the series were retained by the publisher and Gollop played no role in the series post-Apocalypse. The game Laser Squad Nemesis, developed independently by Nick and Julian Gollop, features several similarities to the X-COM games.
In 2005, a spiritual successor with an unrelated plotline to X-COM was released for the Nintendo Game Boy Advance titled Rebelstar: Tactical Command and developed by the Gollop brothers.
Conceived by Julian Gollop as a sequel to his earlier game Laser Squad, the game was picked up by Microprose and published in Europe, Australia and Asia as UFO: Enemy Unknown and in North America as X-COM: UFO Defense.
02.07.2014 - Play X-Com: Ufo Defense online
The same guy who ported Dune II, Aleksander Guryanov, made a version of X-Com: Ufo Defense that can be played in a browser.
For the few ones who doesn't know what I'm talking about... X-Com is a tactical strategy game where you battle aliens in a turn-based gameplay and manage a base in between missions. It's a masterpiece, try it out!