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Half-Life 2 Hints
Tunnel Notes
1 of 6: If you're low on armor, you might want to wait around near the tunnels' entrance door for a scanner to come close enough to be crowbar-bashed. (You may have to move outside briefly to attract its attention, so watch out for chopper fire.)
2 of 6: Not far past the entrance door is an alcove on the right with a ladder that you can climb down to find some health and ammo.
3 of 6: A bit past the alcove, you'll find a supply crate near an armor battery.
4 of 6: From there, head left to find a crouch-only area in the water that has some health kits and a spare explosive barrel in the back.
5 of 6: Explosive barrels are useful in making your way through these tunnels. Every time you come to a slippery downramp with two groups of barnacles hanging above it, you can use an explosive barrel to blow up the first group and then hop over a railing on the left to avoid the second group.
6 of 6: WARNING: There are large gratings at the bottoms of the two slippery downramps that the chopper can shoot through. If you ever approach these gratings (which is never necessary), always wait until just after it stops shooting.
