Following are the titles listed on the back cover of the Expanded Game Rules, from the first printing of July 1982:
NON-FICTION:
- Asimov, Isaac—Extraterrestrial Civilizations
- Bylinsky, Gene—Life in Darwin's Universe
- Dole, Robert—Habitable Planets for Man
- Feinberg, Gerald and Robert Shapiro—Life Beyond Earth: An Intelligent Earthling's Guide to Life in the Universe
- Anthony, Piers—Macroscope
- Anderson, Poul—Ensign Flandry series
- Asimov, Isaac—Foundation trilogy: I, Robot; The Gods Themselves
- Aspirin, Robert—The Cold-Cash War
- Bester, Alfred—The Stars, My Destination
- Blish, James—Cities in Flight
- Bradbury, Ray—The Martian Chronicles
- Brown, Frederick—What Mad Universe
- Brunner, John—Stand on Zanzibar
- Budrys, Algis—Rogue Moon
- Chandler, Bertram A.—Commodore Grimes series
- Clarke, Arthur C.—Rendezvous with Rama; The Fountains of Paradise
- Clement, Hal—Mission of Gravity; Close to Critical; The Nitrogen Fix
- de Camp, L. Sprague—Krishna series
- Dick, Philip K.—Do Androids Dream of Electric Sheep?
- Dickson, Gordon R.—Dorsai series
- Drake, David—Hammer's Slammers
- Farmer, Philip Jose—Riverworld series
- Garrett, Randall—Starship Death
- Goulart, Ron—many short novels
- Haldeman, Joe—The Forever War
- Hansen, Karl—War Games
- Harrison, Harry—Bill, The Galactic Hero; The Stainless Steel Rat; Deathworld series
- Heinlein, Robert—Starship Troopers; The Moon Is a Harsh Mistress
- Herbert, Frank—Dune series
- Laumer, Keith—A Plague of Demons; Retief series; Bolo series
- LeGuin, Ursula—The Left Hand of Darkness
- Lem, Stanislaw—Solaris; The Cyberiad
- Longyear, Barry—Circus World
- Niven, Larry—Ringworld; Ringworld Engineers; Tales of Known Space
- Niven, Larry and Jerry Pournelle—The Mote in God's Eye
- Norton, Andre—Star Rangers
- Pohl, Frederick—Gateway
- Pournelle, Jerry—The Mercenary
- Russel, Eric Frank—The Great Explosion
- Saberhagen, Fred—Berserker series
- Silverberg, Robert—The Man in the Maze
- Simak, Clifford D.—City
- Smith, E. E.—Triplanetary; Space Patrol; others in the Lensmen series
- Stapleton, Olaf—Last and First Men
- Vance, Jack—Big Planet; The Grey Prince; Tschai, Planet of Adventure series; Demon Princes series
- Van Vogt, A. E.—The Weapons Shops of Isher; The Silkie; Voyage of the Space Beagle
- Varley, John—The Persistence of Vision
- Zelazny, Roger—Lord of Light
Leave a few of your own in the comments. (Movies, comics, whatever--it's all acceptable!)