What are some good sci-fi movies?

2001 Space odyssey, (Original) Aliens, Soylent Green, The Day The Earth Stood Still.

Plan 9 from Outer Space (1959).

Alien is one of the best horror movies ever made.

I think it's still the greatest sci fi horror movie of all time as well.

Total recall

Interstellar is my favorite

Sunshine. Moon. Love.

Good in what way? Imaginative, funny or terrifying?

Final fantasy the spirits within

The Matrix and Avatar.

I really liked Arrival

District 9