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In Antichamber, I have managed to access a room adjacent to the room with the red gun. There seems to be a locked door with a mechanism with green lasers and a shape made with yellow blocks.

The room with the red gun

I cannot manage to block the laser or remove the yellow blocks with my blue gun, which is the the only weapon I have so far. Am I stuck because this puzzle is unsolvable without unlocking another colored gun first or should I try harder?

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up vote 3 down vote accepted

You need to get the green gun first, then the yellow, then red.

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It would be better if you showed or linked how to get the previous guns too. – Meraj99 Feb 15 '13 at 9:38

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