| Extension | Description | Available programs |
|---|---|---|
| MSN/MN2/HOG | The MSN/MN2-files specify the order in which to play levels from the HOG-files (MSN for D1/MN2 for D2). The HOG-files are nothing more than a big file containing all files which belong to one mission. | There are a lot of mission managers available. Devil has a small one implemented (so that you can play your levels without running in big trouble) but if you want to do edit Descent missions the serious way, you'll have to get a program which is made for this job like the Descent Manager or Yahoma. |
| RDL/RL2 | Level file format from Descent 1/2. | Devil is as far as I know the only non-commercial program that is capable of editing all of the level data. |
| POG | The POG-files are available since Descent 2 V1.2 (the original textures are in the PIG-files). You can specify new textures in the POG-files which you can use in your own levels (the original textures are in the PIG-files delivered with Descent which are more or less the same format then the POG-files). Furthermore you can put new music and sounds in POG-files. | The only program I know which can handle POG-files is DTX2. |
| HXM | All robot data including the shape of the robots. | As far as I know, there is no program available to change the shape of the robots, so if you are searching for a new project to which you can spend your time, this would be a good choice. |