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Portal 2 Hints
Drop Box Achievement Note
1 of 3: If you haven't gotten the Drop Box achievement yet, you can do so before leaving if there are any cubes in the room with the portal-friendly floor that you haven't touched yet.
2 of 3: If you've already put a cube on the big red button, move it out of the way.
3 of 3: Put an orange portal on the ceiling over the button, then go put a blue portal onto the floor under the untouched cube to drop it onto the button and get the achievement.
