This site is a collection of information on a problem with Half-Life 2 that has plagued many players of this otherwise excellent game. This problem is characterized by a sudden massive drop in frame rate when turning corners or moving into new areas of the game. These drops are usually accompanied by looping or stuttering sound during the frame rate drop which is how most people become aware of the problem. Aside from these isolated drops in frame rate, the game is otherwise perfectly smooth. These sudden drops kill the immersion and lead to a very frustrating experience. Below you will find additional details on this problem, some theories, and all responses from Valve on this problem.

Working with Valve. (Nov. 21, 2004, 4:53 a.m. UTC)
I've started a good email conversation with Gary McTaggart at Valve about this issue. It's clear to me that this is a priority for them now that they have the initial Steam problems sorted out. I will post updates here if any useful info materializes.

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Mark McWilliams