Here is my list of 6 Fun, Easy-Watching Science Fiction Movies.
R.I.P.D (2013)
Synopsis from Rotten Tomatoes:
Veteran lawman Roy Pulsifer (Jeff Bridges) works for the R.I.P.D., a legendary police force charged with finding monstrous spirits who are disguised as ordinary people but are trying to avoid their final judgment by hiding out among the living. When Roy and his new partner, Nick Walker (Ryan Reynolds), uncover a plot that could end all life, they must discover a way to restore the cosmic balance or else watch the tunnel to the afterlife start sending angry souls back to the world of the living.
Back to the Future (1985)
Synopsis from Rotten Tomatoes:
In this 1980s sci-fi classic, small-town California teen Marty McFly (Michael J. Fox) is thrown back into the ’50s when an experiment by his eccentric scientist friend Doc Brown (Christopher Lloyd) goes awry. Traveling through time in a modified DeLorean car, Marty encounters young versions of his parents (Crispin Glover, Lea Thompson), and must make sure that they fall in love or he’ll cease to exist. Even more dauntingly, Marty has to return to his own time and save the life of Doc Brown.
Ghostbusters (2016)
Synopsis from Rotten Tomatoes:
Paranormal researcher Abby Yates (Melissa McCarthy) and physicist Erin Gilbert are trying to prove that ghosts exist in modern society. When strange apparitions appear in Manhattan, Gilbert and Yates turn to engineer Jillian Holtzmann for help. Also joining the team is Patty Tolan, a lifelong New Yorker who knows the city inside and out. Armed with proton packs and plenty of attitude, the four women prepare for an epic battle as more than 1,000 mischievous ghouls descend on Times Square.
Men in Black (1997)
Synopsis from Rotten Tomatoes:
They are the best-kept secret in the universe. Working for a highly funded yet unofficial government agency, Kay (Tommy Lee Jones) and Jay (Will Smith) are the Men in Black, providers of immigration services and regulators of all things alien on Earth. While investigating a series of unregistered close encounters, the MIB agents uncover the deadly plot of an intergalactic terrorist who is on a mission to assassinate two ambassadors from opposing galaxies currently in residence in New York City.
Downsizing (2017)
Synopsis from Rotten Tomatoes:
Mild-mannered therapist Paul Safranek and his wife, Audrey, decide to undergo a process in which scientists shrink people down to miniature size to live in small communities. The irreversible procedure allows the people to gain wealth and a life of leisure while helping to cut down on the consumption of natural resources. As Paul gets to know his new neighbors and surroundings, he soon learns that living in a tiny suburb comes with its own set of huge problems.
Free Guy (2021)
Synopsis from Rotten Tomatoes:
In “Free Guy,” a bank teller who discovers he is actually a background player in an open-world video game, decides to become the hero of his own story… one he rewrites himself. Now in a world where there are no limits, he is determined to be the guy who saves his world his way… before it is too late.