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The Orange Box: Half-Life 2: Episode Two Hints
How can I get to the next grub tunnel safely?
1 of 8: While standing and facing the stone pillar, go a bit left to get the guardian to see you and start knocking rocks toward you.
2 of 8: Catch the rocks with the gravity gun and toss them aside, then wait for the guardian to start down one side of the circular path toward you.
3 of 8: Sprint along the other side of the path until you're near the spot where the guardian was, then run down the tunnel beyond.
4 of 8: Look for a safe grub tunnel on your left as you run along.
5 of 8: It's very, very hard to make it to that tunnel without getting head-butted even once.
6 of 8: However, you can easily survive one head-butt. Wait inside the grub tunnel for the toxin's effects to go away, then run over the nearby grub worms to restore your health to 100.
7 of 8: The inability to make it to the grub tunnel without getting hit is due to running low on auxiliary power as you near the tunnel.
8 of 8: It is possible to avoid that by not starting to sprint on the circular pathway until the guardian is almost upon you. The problem is that you can't be looking behind you as you go along the pathway, and if you get head-butted there, you'd better restore a save and try again.
