Here is a list of some popular and critically acclaimed sci-fi movies from 2018 with a brief summary:

• “Annihilation”: A biologist signs up for a dangerous, secret expedition into a mysterious zone where the laws of nature don’t apply.
• “Avengers: Infinity War”: The Avengers and their allies must be willing to sacrifice all in an attempt to defeat the powerful Thanos before his blitz of devastation and ruin puts an end to the universe.
• “Black Panther”: T’Challa, the new king of Wakanda, rises to the throne in the isolated, technologically advanced African nation, but his claim is challenged by a vengeful outsider who was a childhood victim of T’Challa’s father’s mistake.
• “Ready Player One”: When the creator of a virtual reality world called the OASIS dies, he releases a video in which he challenges all OASIS users to find his Easter Egg, which will give the finder his fortune. Wade Watts finds the first clue and starts a race for the Egg.
• “Solo: A Star Wars Story”: During an adventure into the criminal underworld, Han Solo meets his future co-pilot Chewbacca and encounters Lando Calrissian years before joining the Rebellion.
• “Jurassic World: Fallen Kingdom”: When the island’s dormant volcano begins roaring to life, Owen and Claire mount a campaign to rescue the remaining dinosaurs from this extinction-level event.
• “The First Purge”: To push the crime rate below one percent for the rest of the year, the New Founding Fathers of America test a sociological theory that vents aggression for one night in one isolated community. But when the violence of oppressors meets the rage of the marginalized, the contagion will explode from the trial-city borders and spread across the nation.
• “The Cloverfield Paradox”: Orbiting above a planet on the brink of war, scientists test a device to solve an energy crisis, and end up face-to-face with a dark alternate reality.

Please note that this list is not comprehensive and other sci-fi movies might also be considered as best, but these are some of the popular and critically acclaimed sci-fi movies of 2018.