• 2 College Library

• 4 Combat
• 2 Battles
• 2 Imaginary wars and battles
• 2 Life on other planets
• 2 Shooting
• 2 Soldiers
• 2 Space warfare
• 1 Automobile racing
• 1 Building
• 1 Dragons
• 1 Excavation
• 1 Hand-to-hand fighting
• 1 Imaginary places
• 1 Mining engineering
• 1 Monsters
• 1 Survival

• 2 343 Industries
• 2 Bungie (Firm)
• 1 Double Helix
• 1 Iron Galaxy

• 5 English
• 2 French

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