The most underrated sci-fi movies of the last 15 years

Not every movie can be a blockbuster. That's a pretty standard rule of filmmaking, and it equally applies to the science fiction genre. While some movies are destined to become major box office successes like E.T. or Star Wars, other just-as-deserving films will be relegated to rental racks or Netflix before they gain a cult following. Maybe they received poor initial reviews before catching on with a wider audience, or perhaps they suffered from a limited or low-key theatrical release. Whatever the reason, they all deserve a second look from true science fiction fans. Here's our list of the most underrated sci-fi films of the last 15 years.