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Half-Life 2 Hints
Sentry Gun Tips
1 of 3: The best and quickest way to dispose of these sentry guns is to use the gravity gun to pull in the explosive barrel you see just past the doorway, then move into the doorway and fire the barrel down the hall.
2 of 3: You could instead toss some bugbait down the hall and stay back as your antlions rush forward, but they may take awhile to knock both sentries over.
3 of 3: One other thing you could try is quickly running through the doorway and then to the right. From there, you can run down and attack the sentry guns from the side while the antlions attack them from the front.
