There’s XCOM, and then there’s X-COM. The former refers to the modern strategy games from Civilization developer Firaxis, which are easily some of the best in the genre you can play today. The latter, meanwhile, is the original series as started by MicroProse, and they’re a subset of games entirely worth your time, despite their age. If you’d rather not take a trip back to the videogames of the ‘90s, however, Xenonauts 2 is the perfect modern X-COM substitute. You’re tasked with taking on aliens amid a neverending Cold War, and need to close the technological gap between you and your foe as fast as possible, and you can get it cheap on Steam for a limited time.

MORE FROM PCGAMESN: The best strategy games on PC, The best turn-based strategy games, The best space games on PC