Half-Life is a series that we might not see again, but that hasn't stopped fans admiring the work of the existing games and even adding to it, which is exactly what ex-Valve worker Cayle George has done by releasing a free mod called Half-Life: Caged on Steam.
"Break from captivity, conquer the facility and discover the secrets of Half-Life: C.A.G.E.D.," as explained by the brief description on the Steam page. We don't know much more about the short single-player game aside from that, apart from that there's a soundtrack from Lazerhawk included, and that developer commentary is also available for those who are interested.
For more on the game check out the official trailer below as well as the Steam page. Can this satisfy your Half-Life desires?