The Half-Life 2 fan initiative Project Borealis has shown its progress in a new gameplay video. The project aims to bring to life the missing third episode.

The project aims to bring to life the story of Gordon Freeman and Alyx Vance on their journey to finding and exploring the Borealis - the location last mentioned at the end of Half-Life 2: Episode 2.

Many years have passed but the game's third episode still hasn't been released, leaving many fans without closure, including former scriptwriter Marc Laidlaw.

Project Borealis is being developed in Unreal Engine 4 to provide severely improved visuals when compared to the original Source engine.

Utilizing a different game engine means the development team has had to spend several months recreating Half-Life 2's iconic gameplay mechanics and this progress is shown in the latest video.

The team further states it hopes to release a demo "very soon" to help collect benchmarks and optimize the game for a wide range of hardware.

This demo is expected to feature a recreated version of the iconic location Ravenholm - re-imagined to fit the Borealis theme.

Project Borealis is said to comprise roughly 80 developers dedicated to revisiting the Half-Life series.