| Extension | Description | Contents |
|---|---|---|
| MOD | General 3D object definition | Geometric objects and elements |
| LVL | Level objects file | Actor references |
| LGT | Level lighting file | Light definitions |
| TEX | Level textures file | Texture references |
| GMT | Level materials file | Game material definitions |
| VMT | Level visual materials file | Visual material definitions |
| SPO | Level superobject hierarchy | Superobject definitions |
| SCT | Level sector hierarchy | Sector definitions |
| CAR | Actor data file | |
| MEM | Memory block description file | |