Modder Cobalt-57 has announced that Half-Life Absolute Zero will release on February 12th, 2019. In case you werent aware of, Half-Life: Absolute Zero is a mod dedicated to recreating the pre-release versions of Half-Life. The team aims to recreate the art-style and chapters featured off in Half-Life builds from early to mid 1998, featuring all the chapters, monsters and weapons that never made it into the final build.
Source: N4G PC Half-Life Absolute Zero will recreate the pre-release versions of Half-Life, releases on February 12