Metro: Last Light, a first-person shooter video game developed by 4A Games, was released worldwide.
A nuclear war erupts, devastating the surface of the Earth and making it largely uninhabitable, forcing survivors to live underground in metro tunnels.
Survivors begin organizing themselves in the Moscow metro stations, creating independent factions and communities beneath the irradiated surface.
A faction called the Fourth Reich rises, espousing Nazi ideology and seeking to conquer the metro system.
Strange, mysterious creatures called Dark Ones are discovered in the metro tunnels; they are a key unknown element within the tunnels.
Artyom grows up in the metro system in Station VDNKh amid ongoing dangers and conflicts.
The game begins with Artyom being held captive in the Red Line for saving Hunter at the end of Metro 2033. This catalyzes the events of Last Light involving the hunt for the mysterious Dark One.
Artyom embarks on a mission deep into the metro and surface ruins to find the Dark One and uncover its true nature.
The conflict between factions including the Red Line, Fourth Reich, and Rangers grows, contributing to political instability in the metro.
Artyom enters the heavily fortified D6 military bunker, facing soldiers and confronting the truth about the Dark Ones versus human conflict.
Depending on the player's choices, Artyom either destroys the last Dark One, killing it, or spares it and opens a new future of peace between humans and Dark Ones.