.MAP files are a type of debugging symbol.

These are typically plain text files that indicate the relative offsets of functions for a given version of a compiled binary.

Levels

.MAP files are also uncompiled Quake

Quake (series)

The Quake series is a line of first-person shooter video games produced by id Software.-Overview:The Quake series is somewhat unusual in that its focus changes frequently; the story of Quake II has nothing to do with Quake, and Quake III Arena has little to do with either of its predecessors...

 maps. These files are plain text files. Detailed file format specifications can be found on the internet: Quake MAP Specs

In addition, the game Halo: Custom Edition for PC uses .map files for game levels. Duke Nukem 3D

Duke Nukem 3D

Duke Nukem 3D is a first-person shooter computer game developed by 3D Realms and published by GT Interactive Software. The full version was released for the PC . It is a sequel to the platform games Duke Nukem and Duke Nukem II published by Apogee...

 uses .map files for user-created levels

Level (video gaming)

A level, map, area, or world in a video game is the total space available to the player during the course of completing a discrete objective...

.

Image Maps

Another form of the .MAP file is for HTML image map

Image map

In HTML and XHTML , an image map is a list of coordinates relating to a specific image, created in order to hyperlink areas of the image to various destinations . For example, a map of the world may have each country hyperlinked to further information about that country...

s. An image map is formatted in HTML and creates click-able areas over a provided image.