Here we go, I left a little the HL1 mods to consider some bigs HL2 mods, mostly set during the post-HL1 era, and how some of them could be considered "canon" or "alternate timelines" set in motion for some reason.
Now, what will be the big purpose of all of these issues?? In the end, I will make one big post of timeline, setting all of the most "canon" mods on the "official" HL timeline.
Think of it, like a "HLEU" : Half Life Expanded Universe, like the Star Wars Expanded Universe :) Some of you, guys, modders, have developed such wonderful universes that when I play the mod, I can BELIEVE in it, believe in how this can be a side story of the Valve's universe. So that's the main point.
COASTLINE TO ATMOSPHERE : Here we a mod starting just after HL2 not counting the episodes where you pursue Breen who has gone into a space station and where the Gman switch sides with him. After nearly 6 hour of game, everything blows up and you blows the hell out of both Breen and Gman.
SPACETIME CONTINUUM OF CTA : "what if?" story where we can imagine that Gman stopping time at the end of HL2 causes a temporal paradox where two timelines emerged : the official one with the Episodes, and this one with CTA. True considering that Alyx does not appear in CTA. Barney also dies in CTA. And you don't get to see other characters either.
STRIDER MOUNTAIN : The longest HL2 mod where you have to work with the Resistance trying to destroy the "source" of the Striders.
SPACETIME CONTINUUM OF SM : "what if?" story by the same dev' of CTA, interestingly we can imagine it's really a sequel to CTA, with Gordon having destroyed Breen and Gman, is now continuing his mission to destroy the Combine. True considering nobody really important besides some rebels appear into SM.
PRECURSOR : Playing a rebel going from City 17 to White Forest.
SPACETIME CONTINUUM OF PRECURSOR : Canon. Like said in the game, "303 days before the wake of Gordon Freeman".
MINERVA METASTASIS : Set on an isolated island run over by Combine, it's hard to tell, besides being after the Resonance Cascade. Assuming that the Overwatch are made of humans, here is a supposition :
SPACETIME CONTINUUM OF MINERVA : In-between the loss of the 7 hour war and the beginning of HL2.
1187 : A human during the 7 hour war...
SPACETIME CONTINUUM OF 1187 : Sometimes before and then during the 7 hour war.
RIOT ACT : During Freeman storming Nova Prospekt, ending before the destruction of Nova Prospekt.
To be continued... Next episode (#4) : MISSION IMPROBABLE, RESEARCH AND DEVELOPMENT, DANGEROUS WORLD, EYE OF THE STORM, HUMAN ERROR, CALAMITY, FORWARD MOTION.