| filename extensions | art-335 |
| pk4 | |
| TechTarget file types | art-336 | PK4-Compressed-Pack-Pak-ZIP-file |
| TechTarget file types | art-336 | PK4-Doom-3-Engine-Game-Data-File |
| TechTarget file types | art-336 | PK4-Railroad-Tycoon-3-Packaged-Graphics-PopTop-Software-Inc |
| English | eng-000 | Compressed Pack / ZIP file |
| English | eng-000 | Doom 3 Engine Game Data File |
| English | eng-000 | Railroad Tycoon 3 Packaged Graphics |