- Guerra Mundial
- Guerra Mundial Z
- Guerra no Centro da Terra: A saga da humanidade- Livro 2
- Guerra no Centro da Terra: Ameaça Alienígena - Livro 3
- Guerra no Centro da Terra: Série completa
- Guerra no Centro da Terra: Um mapa, um tesouro, um portal e um segredo - Livro 1
- Guerras Zumbi
- Guerras Zumbi Online: Episódio 5
- Guerras Zumbi Online: Episódio 6
- Gulliver of Mars
- Gulliver of Mars (Sci-Fi Classic)
- Gulliver of Mars (Serapis Classics)
- Gundar
- Gunman's Peace
- Gunn Meets Blue
- Gunpowder Empire
- Guns and Guano
- Gunship
- Gunship (The Complete Series)
- Gunship (Trilogy One)
- Gunship: Chaotic Worlds
- Gunship: Gears and Spears
- Gunship: Glimmeria
- Gunship: Graveyard
- Gunship: Return of the Fear
- Gunship: The Afterworlds
- Gunship: The Blood War
- Gunship: The Colony
- Gunship: The Fleet
- Gunship: The Great War
- Gunship: The Run
- Gunship: Trilogy One
- Gunship: Trilogy Three
- Gunslinger Moon
- Gunslinger Moon: Tales from the Longview 4
- Gunslinger to Earth
- Gunslinger to the Galaxy
- Gunslinger to the Stars
- Gunz & Madge
- Gus
- Gusanos de arena de Dune (Las crónicas de Dune 8)
- Gusanos de Mutghar
- Gwenna
- Gweyr
- Gwiazdozbiór Psa
- Gwynn Place
- Gynoid
- Gypsies
- Gypsy
- Gypsy Soul
- Génesis
- Générations
- Gépzongora
- Götter und Gegner (Chronik der Sternenkrieger 21-24, Sammelband, 500 Seiten Science Fiction Abenteue...
- Götterboten: Eine Erzählung aus der Serie ›Weltensucher‹
- Götterschlacht
- Głębia #1. Skokowiec
- Głębia #2. Powrót
- Głębia #3. Napór
- Głębia #4. Bezkres