 Software
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| Half-Life game series
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Half-Life (Opposing Force • Blue Shift • Decay) • Half-Life 2 (Episode One • Episode Two) • Half-Life: Alyx
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| Portal game series
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Portal (Still Alive) • Portal 2 (Peer Review • PeTI) • The Lab • Aperture Hand Lab • Aperture Desk Job
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| Demos
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Directed Design Experiments • Get Your Free TVs! • Half-Life: Day One • Half-Life 2: Lost Coast • Portal: First Slice • Source Particle Benchmark • Zentraedi Tactical Battle Pod
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| Cut content
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Prospero • Half-Life Alpha • Half-Life: Uplink • Half-Life 2 Beta • Half-Life 2: Episode Three • Half-Life 2: Episode Four
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| Other official games
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Deathmatch Classic • Half-Life Deathmatch: Source • Source • Half-Life 2: Deathmatch • Half-Life 2: Survivor
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| Compilations
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Half-Life: Further Data • Half-Life: Generation • Half-Life: Initial Encounter • The Orange Box
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| Related third-party games
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Codename: Gordon • LEGO Dimensions • Mods • Narbacular Drop • Tag: The Power of Paint
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| Game engines
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GoldSrc • Source • Source 2
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| Development software
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Half-Life SDK • Source SDK • Valve Hammer Editor
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