One of the ways you can wait for a new Half-Life game is to join a roleplaying server, set in Half-Life 2‘s City 17, and play as a citizen. Made with the Source Filmmaker, Mendelevius’ over-the-top example shows that on these servers, surviving can be even harder than, for example, in DayZ.
HL2RP In A Nutshell: Autonomous [Mendelevius, YouTube]
Love the Pulp Fiction reference at the end!
Dont compare this to dayz.
you also forgot to mention that most servers are just a KOS fest and have very petty rules.