Xenonauts is a strategy game in which you control a multi-national military organisation defending a Cold War-era Earth from alien invasion, using small squads of persistent soldiers to eliminate the extraterrestrials and recover their technology in turn-based ground combat. It's an indie game developed and distributed by Goldhawk Interactive in 2014.
System requirements for desktop computers as stated by the developer. Updated on September 30, 2020.
The game is very lightweight to run; all modern laptops can play Xenonauts.
Every new laptop meets the RAM requirement of 2gb, but 1gb is enough to meet the minimum requirements.
Also, note that at least 3gb of storage space is required.