Portal: Outside Influence
|“Oh! That's--that's amazing.”
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|“I can't get over how small you are!”
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Elite Treacle Ltd.
Portal: Outside Influence is a commercial Portal modification, containing elements from Half-Life and System Shock. It will be released on Steam and makes use of a custom build of the Source Engine.
The mod includes new testing elements, environments, music and voice lines. The mod has been designed by Cay Morris, who also designed the Portal map Portal: Skyline.