These are the source files for the Try Anything Twice maps.
(Chambers 1 and 2 are stored together in one file, so there is no hmw02.vmf.)

The map source code in each VMF file is organised into several "visgroups",
each containing one of the major sections of the map. The "_DEV" visgroup
contains items for testing parts of the map and should not be included in final
builds.

This visgroup contains the following subgroups:

-  Blinds: used to blind off one of the major sections for separate testing;

-  Test rigs: contains items for stress-testing the various physics-based
   puzzles in the map.
