Officially, the game is titled "Entropy : Zero". For technical reasons, it will be referred to as "Entropy: Zero" without the space between "Entropy" and the colon.
2017[]
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 Icon  Russian title |
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Entropy: Zero trilogy |
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 A series of mods set in the Half-Life/Portal universe, owned by Valve Official trilogy: Entropy: Zero | Entropy: Zero 2 | Untitled third installment Fan spin-offs: Entropy: Zero - Uprising | Entropy: Zero - Uprising - Episode Two Winner of 1 Mod of the Year |