
"XCOM: Enemy Unknown is a brutal strategy game; a true cry to the games of years past. Although it starts off somewhat tame, as the days tick over, managing the alien assault and the panic levels of Earth becomes far more hectic. All of a sudden, aliens will abduct people in three locations, all of which already have 4 star panic ratings. XCOM provides the same fantastic blend of strategy, tactics, and tension as its predecessor, while totally refreshing the entire game to suit contemporary tastes. No fan of the original will go disappointed, nor will any newcomer to the franchise – despite its shortcomings, XCOM: Enemy Unknown is truly one of the greatest strategy games of all time, a fitting successor to the classic UFO: Enemy Unknown, and an experience that any gamer with even the slightest interest in strategy should experience." | Select Start Media

XCOM: Enemy Unknown rebooted the series back in 2012, and has since inspired numerous new strategy game series to be born.
If someone gets into this I'd recommend getting the enemy within version. It's got all the dlc included so it's the better version. Wish the author would've atleast mentioned it. I didn't see it.
Fantastic game though. Xcom 2 is top notch also. I've spent countless hours in these games.

There are few things more gratifying in gaming than skillfully turning the tide of a conflict. And few genres provide as many opportunities to abruptly reverse the odds via skill and forethought as tactical strategy. To be sure, we are more often than not talking about turn-based tactical mobile games, specifically titles in line with the iconic landmark series (XCOM and Jagged Alliance) that made the genre a genre.

Some games age better than others. When a game is getting on in years, mods can help give the game a little push and make it worth playing again.