Portal is a puzzle type video game that involves using portals to escape a research facility. You are provided with a gun that can generate a red and a blue portal. When you enter the blue portal you exit through the red portal, and vice versa, while maintaining momentum. This game is included in the Half Life 2 Orange Box.
Portal on YTMND
Despite Portal's interesting ending, and interesting concept, YTMNDers have been making YTMNDs that involve Portal. Some of them involve "infinite loops", the Portal ending's song, and cake.
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