Inaccessible chambers/areas in PC TNT level 30, Last Call:

On the east side of the map there are some small areas that
are inaccessible during single-player or Cooperative games,
but are accessible during Deathmatch games.

These include 4 small chambers along the long, dark hallway
on the east side of the map, and a pair of elevated areas
in the final room, one of which contains an Exit switch.

(Note that there are some other tiny areas that may be seen
on the Automap, but are inaccessible during all game modes.
These are external areas which are only used by the game in
support of certain teleport functions, and contain nothing
useful to a player.)

To access a demo of this level which shows a few of the
small chambers accessible in Deathmatch mode, click here.