| English | eng-000 |
| X-COM: UFO Defense | |
| čeština | ces-000 | UFO: Enemy Unknown |
| suomi | fin-000 | UFO: Enemy Unknown |
| français | fra-000 | UFO: Enemy Unknown |
| italiano | ita-000 | UFO: Enemy Unknown |
| polski | pol-000 | UFO: Enemy Unknown |
| português | por-000 | X-COM: UFO Defense |
| українська | ukr-000 | X-Com: UFO Defence |