44		House of Time (Comedy, Mystery, Sci-Fi, 2015)
44		Na yeh ling san, ngo joa seung liu Wong Gok hoi wong dai bou dik hung Van (Comedy, Mystery, Sci-Fi, 2014)
42		Ghosts with Shit Jobs (Comedy, Drama, Sci-Fi, 2012)
42		Paul (Adventure, Comedy, Sci-Fi, 2011)
40		Second Sight (Comedy, Mystery, Sci-Fi, 1989)
39		Evil Aliens (Comedy, Horror, Sci-Fi, 2005)
39		Alien Autopsy (Comedy, Sci-Fi, 2006)
38		Rocky Horror Show Live (Comedy, Musical, Sci-Fi, 2015)
37		The Garden's Keeper (Action, Comedy, Sci-Fi, 2015)
37		Prometheus (Adventure, Mystery, Sci-Fi, 2012)
37		Tribulation 99: Alien Anomalies Under America (Comedy, Sci-Fi, 1992)
37		Big Ass Spider! (Action, Comedy, Sci-Fi, 2013)
37		Night of the Alien (Comedy, Sci-Fi, 2011)
37		Visit to a Small Planet (Comedy, Sci-Fi, 1960)
37		The Watch (Action, Comedy, Sci-Fi, 2012)
37		Earthbound (Family, Sci-Fi, Comedy, 1981)
37		Attack the Block (Action, Comedy, Sci-Fi, 2011)
37		Mars Attacks! (Action, Comedy, Sci-Fi, 1996)
36		Angry Video Game Nerd: The Movie (Adventure, Comedy, Sci-Fi, 2014)
36		Hank, Aaron and the Alien from Outer Space (Comedy, Sci-Fi, 2009)
36		Alien Opponent (Action, Comedy, Sci-Fi, 2010)
36		When London Sleeps It Came Alive (Comedy, Sci-Fi, 2010)
36		Alien Trespass (Comedy, Horror, Sci-Fi, 2009)
36		I Heart Doomsday (Comedy, Romance, Sci-Fi, 2010)
36		Absolutely Anything (Comedy, Sci-Fi, 2015)
35		Your Friends Close (Comedy, Drama, Mystery, Sci-Fi, 2013)
35		Disappearing Bakersfield (Adventure, Comedy, Mystery, Sci-Fi, 2012)
35		One-Eyed Monster (Comedy, Horror, Sci-Fi, 2008)
35		Cocoon: The Return (Adventure, Comedy, Mystery, Sci-Fi, 1988)
35		The Monster (Comedy, Horror, Mystery, Sci-Fi, 1925)
35		Interplanetary (Comedy, Horror, Sci-Fi, 2008)
35		S4 (Comedy, Horror, Sci-Fi, 2008)
35		Target Audience 9.1 (Comedy, Sci-Fi, 2007)
34		Project 12 (Sci-Fi, 2012)
34		Slither (Comedy, Horror, Sci-Fi, 2006)
34		2001: A Space Odyssey (Adventure, Mystery, Sci-Fi, 1968)
34		Kaboom (Comedy, Mystery, Romance, Sci-Fi, 2010)
34		The Last Dudes on Earth (Comedy, Sci-Fi, 2005)
34		The Hitchhiker's Guide to the Galaxy (Adventure, Comedy, Sci-Fi, 2005)
34		Beyond Redemption: Space Captain (Adventure, Comedy, Horror, Sci-Fi, 2014)
33		Get Pony Boy (Comedy, Horror, Mystery, Sci-Fi, 2007)
33		Phil the Alien (Comedy, Sci-Fi, 2004)
33		Freezer Burn: The Invasion of Laxdale (Action, Adventure, Comedy, Sci-Fi, 2008)
33		Evil Alien Conquerors (Comedy, Sci-Fi, 2003)
33		Decoys (Comedy, Horror, Sci-Fi, 2004)
32		Detention (Comedy, Horror, Sci-Fi, 2011)
32		Overtime (Comedy, Horror, Sci-Fi, 2011)
32		The Troops & Aliens (Comedy, Crime, Sci-Fi, 1979)
32		Alien Space Avenger (Comedy, Horror, Sci-Fi, 1989)
32		The Cat from Outer Space (Comedy, Family, Sci-Fi, 1978)
32		Purple People Eater (Comedy, Family, Sci-Fi, 1988)
32		My Stepmother Is an Alien (Comedy, Romance, Sci-Fi, 1988)
32		Very Close Encounters of the Fourth Kind (Comedy, Sci-Fi, 1978)
32		Codependent Lesbian Space Alien Seeks Same (Comedy, Romance, Sci-Fi, 2011)
32		Dark Star (Comedy, Sci-Fi, 1974)
32		Remote Control (Comedy, Romance, Sci-Fi, 1988)
32		Repo Man (Comedy, Crime, Sci-Fi, 1984)
32		UFOria (Comedy, Sci-Fi, 1985)
32		Illegal Alien (Comedy, Sci-Fi, 1982)
32		I Was a Zombie for the F.B.I. (Comedy, Sci-Fi, 1982)
32		Voyage of the Rock Aliens (Musical, Sci-Fi, Comedy, 1984)
32		The Brother from Another Planet (Comedy, Sci-Fi, 1984)
32		Blood Suckers from Outer Space (Comedy, Horror, Sci-Fi, 1984)
32		Hyperspace (Sci-Fi, Comedy, 1984)
32		Nothing Lasts Forever (Comedy, Fantasy, Sci-Fi, 1984)
32		Fright Show (Horror, Comedy, Sci-Fi, 1985)
32		TerrorVision (Comedy, Horror, Sci-Fi, 1986)
32		Bad Taste (Comedy, Horror, Sci-Fi, 1987)
32		Critters 2 (Comedy, Horror, Sci-Fi, 1988)
32		Not of This Earth (Comedy, Horror, Sci-Fi, 1988)
32		Killer Klowns from Outer Space (Comedy, Horror, Sci-Fi, 1988)
32		Real Men (Action, Comedy, Sci-Fi, 1987)
32		Eat and Run (Comedy, Sci-Fi, 1987)
32		Night of the Creeps (Comedy, Horror, Sci-Fi, 1986)
32		The Pink Chiquitas (Comedy, Horror, Sci-Fi, 1987)
32		Big Meat Eater (Comedy, Musical, Sci-Fi, 1982)
32		Star Trek: The Motion Picture (Adventure, Mystery, Sci-Fi, 1979)
32		John Dies at the End (Comedy, Horror, Sci-Fi, 2012)
32		Coneheads (Comedy, Sci-Fi, 1993)
32		Space Case (Comedy, Sci-Fi, 1992)
32		The Rocket Man (Family, Sci-Fi, Comedy, 1954)
32		Breakfast of Aliens (Comedy, Horror, Sci-Fi, 1993)
32		The Lost Skeleton of Cadavra (Comedy, Horror, Sci-Fi, 2001)
32		Invasion of the Saucer Men (Comedy, Horror, Sci-Fi, 1957)
32		Critters 3 (Comedy, Horror, Sci-Fi, 1991)
32		The World's End (Action, Comedy, Sci-Fi, 2013)
32		Return to Nuke 'Em High Volume 1 (Comedy, Horror, Sci-Fi, 2013)
32		Frequencies (Mystery, Romance, Sci-Fi, 2013)
32		Geminis (Comedy, Drama, Sci-Fi, 2013)
32		Plato's Reality Machine (Comedy, Drama, Sci-Fi, 2013)
32		The High Crusade (Adventure, Comedy, Sci-Fi, 1994)
32		Evolution (Comedy, Sci-Fi, 2001)
32		Galaxy Quest (Adventure, Comedy, Sci-Fi, 1999)
32		What Planet Are You From? (Comedy, Sci-Fi, 2000)
32		The Mating Habits of the Earthbound Human (Comedy, Sci-Fi, 1999)
32		Abby Sen (Comedy, Drama, Sci-Fi, 2015)
32		My Favorite Martian (Comedy, Family, Sci-Fi, 1999)
32		La lengua asesina (Comedy, Sci-Fi, Horror, 1996)
32		Oblivion 2: Backlash (Adventure, Comedy, Sci-Fi, 1996)
32		Flytrap (Comedy, Drama, Sci-Fi, 2015)
32		Pet Shop (Comedy, Family, Sci-Fi, 1994)
32		Plan 10 from Outer Space (Comedy, Sci-Fi, 1995)
32		Astronomy of Errors (Comedy, Romance, Sci-Fi, 2000)
32		Transolar Galactica (Comedy, Sci-Fi, 2011)
32		The Search for Simon (Comedy, Sci-Fi, 2013)
32		Morons from Outer Space (Comedy, Sci-Fi, 1985)
32		Unlucky (Comedy, Fantasy, Sci-Fi, 2011)
32		The Monitors (Comedy, Sci-Fi, 1969)
32		Grabbers (Comedy, Horror, Sci-Fi, 2012)
32		A Little Bit Zombie (Comedy, Horror, Sci-Fi, 2012)
32		Paramnesia (Action, Mystery, Sci-Fi, 2011)
32		Toomorrow (Comedy, Musical, Sci-Fi, 1970)
32		Humans vs Zombies (Comedy, Horror, Sci-Fi, 2011)
32		Alien Zombie Invasion (Comedy, Horror, Sci-Fi, 2011)
32		Slaughterhouse-Five (Comedy, Drama, Sci-Fi, 1972)
32		Sweet Prudence and the Erotic Adventure of Bigfoot (Comedy, Horror, Sci-Fi, 2011)
32		Wolfe with an E (Comedy, Music, Sci-Fi, 2011)
32		Iron Sky (Action, Comedy, Sci-Fi, 2012)
32		Folklore (Comedy, Sci-Fi, 2012)
32		Space Milkshake (Comedy, Sci-Fi, 2012)
32		The Borrower (Comedy, Horror, Sci-Fi, 1991)
32		Kiss Me Quick! (Comedy, Sci-Fi, 1964)
32		Serena the Sexplorer (Comedy, Sci-Fi, 2013)
32		Copposites (Comedy, Family, Sci-Fi, 2012)
32		Rock Jocks (Comedy, Sci-Fi, 2012)
32		A Man Called Nereus (Action, Comedy, Sci-Fi, 2012)
32		Zombies from Outer Space (Comedy, Horror, Sci-Fi, 2012)
32		Spaced Invaders (Adventure, Comedy, Sci-Fi, 1990)
31		Missy and the Maxinator (Adventure, Mystery, Sci-Fi, 2009)
31		Dohrnii (Comedy, Sci-Fi, Thriller, 2015)
31		Le grand tout (Comedy, Drama, Sci-Fi, 2016)
31		The Big Empty (Comedy, Drama, Mystery, Sci-Fi, 2003)
31		Atop the Fourth Wall: The Movie (Comedy, Sci-Fi, 2015)
31		Probable Robot (Comedy, Sci-Fi, 2015)
31		ZMD: Zombies of Mass Destruction (Comedy, Horror, Sci-Fi, 2009)
31		Divergent (Adventure, Mystery, Sci-Fi, 2014)
31		Space Station 76 (Comedy, Drama, Sci-Fi, 2014)
31		Cooties (Comedy, Horror, Sci-Fi, 2014)
31		Robodoc (Comedy, Sci-Fi, 2009)
31		April (Comedy, Drama, Sci-Fi, 2014)
31		Final Flesh (Comedy, Sci-Fi, 2009)
31		Way Down in Chinatown (Comedy, Horror, Sci-Fi, 2014)
31		Hot Tub Time Machine (Comedy, Sci-Fi, 2010)
31		Meltdown (Comedy, Horror, Sci-Fi, 2014)
31		Frequently Asked Questions About Time Travel (Comedy, Sci-Fi, 2009)
31		Zombie Epidemic (Comedy, Horror, Sci-Fi, 2009)
31		Zombie Abomination: The Italian Zombie Movie - Part 1 (Comedy, Horror, Sci-Fi, 2010)
31		Jackboots on Whitehall (Animation, Comedy, Sci-Fi, 2010)
31		Very Little Time (Fantasy, Mystery, Sci-Fi, 2009)
31		The Dead Can't Dance (Comedy, Horror, Sci-Fi, 2010)
31		Parody Movie (Adventure, Comedy, Sci-Fi, 2009)
31		The Diamonds of Metro Valley (Action, Comedy, Sci-Fi, 2010)
31		Cryptopticon (Crime, Mystery, Sci-Fi, 2010)
31		Wapakman (Action, Comedy, Sci-Fi, 2009)
31		The Killer Robots and the Battle for the Cosmic Potato (Comedy, Sci-Fi, 2009)
31		Circuit (Comedy, Drama, Sci-Fi, 2009)
31		Doctor S Battles the Sex Crazed Reefer Zombies: The Movie (Comedy, Horror, Sci-Fi, 2009)
31		Doghouse (Comedy, Horror, Sci-Fi, 2009)
31		The Maze Runner (Action, Mystery, Sci-Fi, 2014)
31		End of Days, Inc. (Comedy, Sci-Fi, 2015)
31		Last of the Living (Comedy, Horror, Sci-Fi, 2009)
31		Self/less (Action, Mystery, Sci-Fi, 2015)
31		Land of the Lost (Adventure, Comedy, Sci-Fi, 2009)
31		American Ultra (Action, Comedy, Sci-Fi, 2015)
31		Out of the Fog (Fantasy, Mystery, Sci-Fi, 2009)
31		Unremembered (Mystery, Sci-Fi, 2009)
31		Rod the Stormtrooper: Episode V - The Hidden Darkness (Action, Comedy, Sci-Fi, 2015)
31		Other Halves (Comedy, Horror, Sci-Fi, 2015)
31		Revenge of the Bimbot Zombie Killers (Comedy, Sci-Fi, 2014)
31		Anxietyville (Comedy, Drama, Sci-Fi, 2015)
31		PK (Comedy, Drama, Romance, Sci-Fi, 2014)
31		Revenge of the Spacemen (Comedy, Horror, Sci-Fi, 2014)
31		Hot Tub Time Machine 2 (Comedy, Sci-Fi, 2015)
31		Gentlemen Broncos (Adventure, Comedy, Sci-Fi, 2009)
30		Muppets from Space (Adventure, Comedy, Family, Sci-Fi, 1999)
30		The Hidden Hand (Comedy, Horror, Mystery, Sci-Fi, 1942)
30		Earthbound (Comedy, Fantasy, Romance, Sci-Fi, 2012)
30		Abbott and Costello Meet Dr. Jekyll and Mr. Hyde (Comedy, Horror, Mystery, Sci-Fi, 1953)
30		Go and Get It (Comedy, Drama, Mystery, Sci-Fi, 1920)
30		Oblivion (Action, Adventure, Mystery, Sci-Fi, 2013)
30		Escape from Planet Earth (Animation, Adventure, Comedy, Sci-Fi, 2013)
30		Memphis Rising: Elvis Returns (Action, Adventure, Comedy, Sci-Fi, 2011)
30		Men in Black 3 (Action, Adventure, Comedy, Sci-Fi, 2012)
30		Zeppo: Sinners from Beyond the Moon! (Comedy, Horror, Sci-Fi, 2007)
30		Zombie Strippers (Comedy, Horror, Sci-Fi, 2008)
30		The Adventures of Buckaroo Banzai Across the 8th Dimension (Adventure, Comedy, Romance, Sci-Fi, 1984)
30		Uchuujin from Outer Space (Comedy, Sci-Fi, 2007)
30		Beyond the Quest (Mystery, Sci-Fi, 2007)
30		Freezer Burn (Comedy, Drama, Sci-Fi, 2007)
30		Stolen Life (Animation, Mystery, Sci-Fi, 2007)
30		Spidertron (Action, Comedy, Sci-Fi, 2008)
30		Superhero Movie (Action, Comedy, Sci-Fi, 2008)
30		Time Bandits (Adventure, Comedy, Fantasy, Sci-Fi, 1981)
30		Dublin 26.06.08: A Movie in 4 Days (Comedy, Drama, Sci-Fi, 2008)
30		The Nude Bomb (Comedy, Crime, Mystery, Sci-Fi, 1980)
30		Visioneers (Comedy, Drama, Sci-Fi, 2008)
30		Mock Up on Mu (Comedy, Sci-Fi, 2008)
30		Horror in the Wind (Comedy, Sci-Fi, 2008)
30		Dr. Plonk (Action, Comedy, Sci-Fi, 2007)

Notes: Movies similar to The Children of Terra Firma, Movies like The Children of Terra Firma, Comedy, Mystery, Sci-Fi, Jared Liebenau, Seth Milstein, Patrick O'Driscoll, Dylan Skye Kennedy, Jon James, SF, Science Fiction, SciFi, Sci Fi, Films, Video, Movie Similarities