X-COM Apocalypse is the third entry into the X-COM series, developed by Mythos Games and published by MicroProse for DOS and Windows in 1997.
Apocalypse utilizes the same Cityscape and Battlescape camera modes as the two previous games. However, unlike UFO: Enemy Unknown, this one takes place in one location known as Mega Primus. Apocalypse also includes the option to do either turn-based or, for the first time, real-time combat modes. It's a bit change considering the series was famous for the turn-based gameplay. It also improved the graphics and user interface compared to the earlier entries.
Apocalypse picks up the game 50 years after X-COM: Terror from the Deep. Since the last war with the aliens, Earth isn't doing so hot. Large cities with controlled atmospheres have been created to protect humanity. As if a ruined planetary environment wasn't bad enough, more aliens have come a-calling. These new aliens have no relation to the previous invaders, and they have not come in peace. Like the last two entries, you have to manage resources, engage in combat, and research the aliens to learn their weaknesses. You take control of vehicles to deal with any threats, alien and otherwise, as human factions are working against you as well. Ultimately, it is X-COM's goal to take the fight to the aliens and destroy their gateway to our planet. With a good mix of weapon choices, mostly destructible terrain, and blowing up alien portals, you may find yourself immersed so deep you forget your mission.
Apocalypse got a rough start in production, and the partnership was described as 'disastrous', but they pulled it together well enough in the end. The result was an entertaining game with a lot to offer. Apocalypse is massive, immersive, and will provide you hours of fun and challenge.