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Half-Life 2: Episode One Hints
How can I get the containment machine activated in this control room?
1 of 4: This one has the same sort of setup, with a "throw me the ball" generator up on the wall near the machine's closed floor shield.
2 of 4: Notice that there's a handy energy orb bouncing around in a bouncy-orb-style generator nearby.
3 of 4: You might as well grab it and toss it at the containment machine's generator.
4 of 4: If you miss, you can always go back to the core room and bring an orb in from there (or quickrestore and try again with the handy orb).
