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Half-Life 2: Episode One Hints
Headcrab Tip
1 of 4: Look down through the grate to see a headcrab moving around on the floor below.
2 of 4: Try to blast the grate out with the gravity gun so that it kills the headcrab.
3 of 4: If it doesn't, you can toss the flare from earlier down at it to set it on fire (if that flare hasn't burned out yet).
4 of 4: Or you can just drop down and quickly hit it with a few primary-fire blasts from the gravity gun.
