W3M file extension

Map File

The file extension .W3M is that given to a map file used by 'Relic' computer games. (most commonly 'Warcraft 3').

A computer game map file .W3M contains information describing the terrain layout and design of the selected game 'arena' i.e. the area in which the game will take place.

Warcraft 3 is an RTS 'real-time strategy'war game.