

Project Three is a fan-made sequel to Half-Life 2: Episode Two, inspired by Mark Laidlaw's Epistle 3 script, which was adjusted and refined by fans to fit the cooperative story campaign.
| Edition | Platform | Release Date | Region |
|---|---|---|---|
| Standard Edition | PC | Mar 21, 2025 | Worldwide |
| Standard Edition | PC | Mar 21, 2025 | Worldwide |