In the absence of news related to Half-Life, fans have made several projects -some are complete, some are not- to update the original Valve game. Project Lambda is one of these games and will seek to offer graphics similar to those of the current generation.
At the moment, Project Lambda recreates only the first chapter of the 1998 game, unlike for example Black Mesa of 2012 that remade the whole game - but with a somewhat outdated graphic aspect.
The team is using the Unreal Engine 4 program and the artistic direction is slightly different from the original. You can follow the progress and download the demo on the official page.