Obscure sci-fi film? Hmm... I'll chuck a few out there: Alphaville, La Jetee, Fahrenheit 451, Fantastic Planet, Zardoz, The Glitterball, Dark Star, THX-1138, Dreamscape, The Brother from Another Planet, Enemy Mine, The Philadelphia Experiment, Event Horizon, Gattaca, Dark City, Titan AE, and Equilibrium.