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The Orange Box: Portal Hints
How can I power the lift in this chamber?
1 of 5: By opening a blue portal that the energy orb can go through to reach the receptor device.
2 of 5: Notice that the orb makes a black mark on the right wall where it bounces off of it.
3 of 5: Also notice that the orange portal is on the floor directly beneath the receptor device.
4 of 5: So fire a blue portal at the black mark on the wall.
5 of 5: That'll get the orb to go up and into the receptor device.
