I don't need to test my programs. I have an error-correcting modem.
Legacy:Map File
From Unreal Wiki, The Unreal Engine Documentation Site
A Map file is just like any other Unreal Engine file packages. Being a package they can contain all types of resources; the .unr file extension is merely a convention to denote "this package contains brushes and actors that make a playable map."
Check Antonio Cordero's website for a pretty thorough documentation of the Unreal package format and a Delphi unit that implements it.
Game | File Extension |
Unreal Unreal Tournament |
.UNR |
Unreal 2 | .UN2 |
UT2003 UT2004 |
.UT2 |
DeusEx | .DX |