Science fantasy

An obvious example would be where robots and demons/faeries/etc. exist together, but it's pretty much enough you have someone fighting demons or other supernatural beings with modern-ish weapons (though these are possible better described as contemporary fantasy or paranormal).

Science fiction is very loose defining trait for this.

As a popularly known example: Star Wars is Science Fantasy when The Force is involved.

See also: mixed technology, luddites
Related: weird science
Possible overlap: contemporary fantasy, paranormal

Not to be confused with techno-fantasy.