• 3 Human-alien encounters
• 2 War video games
• 1 Adventure video games
• 1 Battles
• 1 Combat
• 1 Cyborgs
• 1 Demonology
• 1 Extraterrestrial beings
• 1 Fantasy fiction
• 1 Flight simulation video games
• 1 Games
• 1 Gunfights
• 1 Interplanetary travel
• 1 Life on other planets
• 1 Marines
• 1 Shooting
• 1 Sony video games
• 1 Space ships
• 1 Star Wars films
• 1 Video games

• 1 Accolade, Inc
• 1 Atari, Inc
• 1 Bethesda Softworks (Firm)
• 1 Code Monkeys
• 1 Id Software, Inc
• 1 LucasArts (Firm)
• 1 Rainbow Arts

• 4 English

• 1 Mars (Planet)

• 4 Computer games
• 4 Video games
• 1 Computer adventure games
• 1 Computer war games
• 1 PlayStation 4 video games

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