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Instead of Going

version 3/071115 by Mikael Segercrantz

Allows the author to create properties to describe blocked exits in specific rooms; allows more intelligent default responses when the player tries to go in a useless direction. (Unsupported, but we leave it up here for people who want to use it especially with older versions of Inform prior to 5T18.)

You can do three things here:

1. Download this extension,
2. View its documentation, or
3. View its source code.