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The Orange Box: Half-Life 2: Episode Two Hints
Barnacle Cluster Tip
1 of 4: Look past the tongues.
2 of 4: You see that explosive barrel?
3 of 4: You'll probably know from playing the main game that you can easily take out barnacle clusters by getting one of them to grab onto an explosive barrel, then shooting it twice with the pistol so that it'll explode after it's pulled up next to the barnacles.
4 of 4: So pull on this explosive barrel with the gravity gun until a barnacle latches onto it, then shoot it twice with the pistol and back away.
