XCOM 2 ratchets the tension even higher than the original reboot by putting you on the offense, as XCOM becomes a guerrilla force in a world conquered by aliens. You command a force of soldiers putting their lives on the line to conquer the threat. That’s no joke: If one of the commandos under your watch dies, he stays dead, taking his hard-won experience with him. Too many wrong moves could leave your squad stacked with rookies rather than grizzled vets, possibly forcing you into restarting the game.
XCOM 2‘s tactical, turn-based combat is tough, with both maps and enemies randomized for every battle, but the game gives you plenty of time to think through your moves. During the strategic phase between missions, you deal with organizational tasks—managing finances, expanding XCOM’s influence, researching newly uncovered alien tech, et cetera. You have to balance between striking the aliens where it hurts while avoiding their counterattacks, juggling scarce resources all the while. It’s excellent.
The game offers near endless replayability, but if you get sick of the basic scheme, two additional modes turn XCOM 2 into whole new games, essentially. War of the Chosen is an official expansion by Firaxis that adds a ton of new factions, enemies, storylines, weapons, and more, while the sublime Long War 2 total conversion mod greatly extends the duration of the game and ramps up the importance of the strategic map and resource planning. They’re both excellent, full stop.