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Return to Mysterious Island Hints
How do I take a key from a guardian robot?
1 of 9: The only way to get a key from any of the guardian robots is to destroy the robot.
2 of 9: And the only way to destroy a robot is to blast him with something...
3 of 9: ... a cannon, a shotgun, or some other weapon.
4 of 9: And in so doing, you will find (in each case) that the robot's key is partially destroyed.
5 of 9: In fact, no robot is left with more than a single crystal in their key.
6 of 9: Which means that you have to find and destroy at least four of the guardian robots, and retrieve each of their keys.