Hack command
The Hack command is used, in conjunction with a suitable ME or LE weapon, to clear the brush in certain areas, that have listed directions of "Blazed trails:"
Use
Each attempt to hack, successful or otherwise, will incur a RT time of between 10 and 20 seconds.
There is a check to see whether or not the correct direction is chosen, and if failed, will make progress in another direction.
Over multiple uses, a direction will go from "(impassable)" to "(barely passable)" and finally to "(passible)." However, a passable path in one direction may be a barely passible path from the other side.
Impassible Direction
If the direction is not possible to travel, the underbrush "proves stubbornly resistant and you make no progress." There is a bug in that if a direction that cannot be traveled is chosen due to failure to find the correct direction, it will waste the effort and give you a message as if you are making progress.
Duration of Trails
Trails in viable directions will eventually fade, but will do so more slowly as long as there is a PC in the room.
Trails in non-viable directions will never make it past impassible and will fade regardless of the occupancy of a room.
Syntax
HACK <cardinal direction>