Contributed by Atif Zafar
| Scenery files containing elements such as static 3D models, dynamic objects, terrain, roads etc. | .BGL extension |
| Airplane model files | .MDL extension |
| Panel files | .CFG (configuration) and .BMP (for panel images) |
| Gauge files | .GAU (these contain the code that defines the behavior of gauges inside a panel) |
| Textures for airplanes | .0AF, .1AF, .2AF (AF probably stands for Aircraft Factory) |
| Aerodynamics files for aircraft | .AIR |
| Textures for scenery objects and terrain | .PAT, .R8, .OAV, .BMP etc. (multiple extensions exist for these) |
| Adventure and Situation files | .STN (?) |