Metro: Last Light is a first-person shooting game based on the Metro 2033 series of novels set in the ruins of a post-apocalyptic Moscow. Players explore the subway tunnels of the city while fighting off mutants and hostile human opponents from various factions.
While the game features a variety of firearms to use in combat, players must also scavenge for resources and ammunition needed to survive. Military-grade ammo is used as currency to purchase new firearms which can also be scavenged off fallen foes. Though Metro: Last Light features regenerating health, the game interface aims for immersion and as such does not readily provide details on screen such as health or remaining filters for the gas mask. The player can also "role-play" to a certain extent due to a Karma system based on player actions throughout the game.