Because the Metro Exodus is launching next year you might be down to try out a Metro predecessor. All you need is a good gaming PC that will be able to run the game. Available only for 24 hours, you can go to this Steam link to grab Metro 2033 for FREE.
The deal goes away October 26 at 10 AM PT (1 PM ET / 6 PM BT) so hurry up and snatch it while you still can!
Metro 2033 is a FPS shooter situated in a post-nuclear environment where a vast majority of human population was wiped. Survivors in Moscow have fled underground where they have been in hiding for quite some time, struggling to survive whilst mutants roam everywhere.