On this page, you can find every version of Earth's Special Forces, from Alpha, to Beta to the Open Beta which will be v1.3 (Non-Beta) in the future. All these current versions are for Steam only and you also need Half-Life 1. Earth's Special Forces will not work for the Source version (Half-Life: Source, Half-Life 2, etc). This Modification does also not work with the Condition Zero Package. Earth's Special Forces v1.2.3 is the latest public version that mostly everyone is playingw.

Earth's Special Forces - v1.2.3 Full
- Half-Life 2 Files
- ESF-World
- ESF-World (Linux Server Files)

Earth's Special Forces - Alpha
- ESF-World (v1.9 Non-Steam Compatible)
- ESF-World (v2.0 Steam Compatible Version)

Earth's Special Forces - v1.x
- ESF-World (Steam Compatible Version)

Earth's Special Forces: Open Beta (Christmas Release)
- Half-Life 2 Files Mirror