is a modification that Aims to improve half-life 2's mostly stale combat system compared to the original Half-life(1998), inspired by mods like Halt-life 2: MMod and Smod, Half-life 2: Rebuild adds, new weapons, nev visual improvements, general more fluid feel and A more fun experience for the player, The mods combat has been designed similarly to Quake/Classic Doom style, it feels much faster then default hl2 or even hl1.
The mod includes all of hl2's campaign and it's episodes packaged into one single experience for the players and modding convenience, Half-life 2 rebuild is also a modbase, to jumpstart any mod you want, you can call it "Mmod with open source code" if you want to.