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Related terms:
xen
alyx
stasis
valve
steam
sierra
combine
citadel
freeman
alyx vance
black mesa
shooter
game
source engine
gordon freeman
original game
valve corporation
content delivery
sierra entertainment
video game
artificial intelligence
Wikipedia sources: Gabe Newell Half-Life 2 Valve Corporation Left 4 Dead 2 Half-Life (series) Context for words: gabe newell |
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