List of disaster twin films

Twin films are films with the same, or a very similar, plot produced or released at the same time by two different film studios.
The phenomenon can result from two or more production companies investing in similar scripts around the same time, resulting in a race to distribute the films to audiences.
Some attribute twin films to films dealing with topical issues, such as volcanic eruptions, earthquakes, terrorist attacks, or significant natural disasters, resulting in multiple discovery of the concept.
== Examples ==
This list only focuses disaster films.
First film 	Release date 	Second film 	Release date 	Similarities
Them! 	June 19, 1954 	Godzilla 	November 3, 1954 	Both films feature a creature being mutated by nuclear bomb testing and wreaking havoc in a major city.
Dr. Strangelove 	January 29, 1964 	Fail Safe 	October 7, 1964 	Both films deal with the concept of accidental nuclear war, although Dr. Strangelove is satire, while Fail Safe is a drama.
Independence Day	July 3, 1996 	Mars Attacks! 	December 13, 1996	Both films focus on a global alien invasion of Earth.
Dante's Peak 	February 7, 1997 	Volcano 	April 25, 1997 	Both films are centered around volcanic eruptions.
Deep Impact 	May 8, 1998 	Armageddon 	July 1, 1998 	Both films are centered around an impending impact event that threatens to end most or all life on Earth.
Knowing 	March 20, 2009 	2012 	November 13, 2009	Both films are about the end of the world being caused by the Sun.
Skyline 	November 12, 2010	Battle: Los Angeles 	March 11, 2011 	Both are alien invasion movies that primarily take place in Los Angeles.
Melancholia 	May 18, 2011 	Seeking a Friend for the End of the World	June 22, 2012 	Both are apocalyptic science-fiction films focusing only on specific individuals during a global catastrophe.
This Is the End 	June 12, 2013 	The World's End 	August 23, 2013 	Both are apocalyptic comedy films also focusing on the end of the world.
Greenland 	December 18, 2020	#JusticeForLove: End of the World 	December 25, 2020	Both films focus on an impending impact event from the perspective of specific individuals. Greenland primary focuses on the human cast, while #JusticeForLove: End of the World focuses more on the impact event.