• 4 Extraterrestrial beings
• 4 Imaginary wars and battles
• 4 Life on other planets
• 4 Shooting
• 3 Aliens (Motion picture)
• 3 Sony video games
• 2 Dystopias
• 2 Fantasy games
• 2 Space warfare
• 1 Adventure video games
• 1 Alien (Motion picture)
• 1 Hand-to-hand fighting
• 1 Pillage
• 1 Quests (Expeditions)
• 1 Science fiction
• 1 Space colonies
• 1 Space stations
• 1 Video games
• 1 Weapons

• 3 Gearbox Software
• 3 Sega of America (Firm)
• 2 Activision (Firm)
• 2 Bungie (Firm)
• 2 Electronic Arts (Firm)
• 2 Holospark (Firm)
• 1 Bethesda Softworks (Firm)
• 1 BioWare Corp.
• 1 Insomniac Games
• 1 Microsoft Corporation
• 1 Sony Computer Entertainment

• 12 English
• 1 French

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