The Fallout series is known for its post-apocalyptic setting, where players explore a world ravaged by nuclear war.

The Chernobyl Nuclear Power Plant is the site of a major nuclear disaster in 1986, and it serves as the focal point of the game's story.

Preston Garvey is a prominent character in Fallout 4, where he leads the Minutemen faction and assigns players with various settlement-building and defense missions.

The Aurora is a nuclear-powered train that serves as the primary means of transportation for the characters in Metro Exodus.

The Brotherhood of Steel is a prominent faction in the Fallout series, known for their technological prowess and their quest to acquire and preserve pre-war technology.

The Green Flu is a deadly virus that has caused a global pandemic and societal collapse in The Division, leading to the formation of factions and the struggle for survival.

GLaDOS is the central antagonist in the Portal series, an artificial intelligence that oversees the Aperture Science facility and challenges players with various puzzles and obstacles.

Nova 6 is a deadly nerve agent and nuclear weapon that serves as the primary target of a covert operation in Call of Duty: Black Ops.

Dr. Breen is a prominent character in Half-Life 2, serving as the human leader of the Combine occupation forces and collaborating with the alien race to maintain control over Earth.

Monolith is a mysterious and powerful faction in S.T.A.L.K.E.R.: Call of Pripyat, seeking to control the Chernobyl Nuclear Power Plant and its surrounding area for their own purposes.

Ellie is a central character in The Last of Us, a young girl who forms a bond with Joel, a smuggler, as they journey across a post-apocalyptic United States.

The Strip is a faction in Fallout: New Vegas, led by Mr. House, that controls the New Vegas Strip and is known for its luxurious casinos and entertainment venues.

Gordon Freeman is the protagonist of the Half-Life series, a scientist who battles aliens and otherworldly creatures in a research facility known as Black Mesa.

The Red Line is a faction in Metro: Last Light that seeks to control the D6 military bunker and its resources, posing a threat to the survival of other factions in the Moscow Metro.

Snake is the protagonist of the Metal Gear Solid series, a mercenary who infiltrates various locations to carry out espionage and sabotage missions, often involving nuclear weapons and advanced technology.