I just want to know one thing: what happened to Half-Life 2 Episode III ? As it is, I'll wait for people to play this and tell me if it ends in a cliffhanger too.
Since it says it takes place between HL1 and HL2, what cliffhanger could there be?
You can subscribe to https://www.youtube.com/channel/UCrMEAJ54k0d2Gvjof4GF6Vg/vid... if you want a daily update on HL3 news. But the other comment's link to the writer's conclusion is worthwhile for closure since we'll probably never get the game version.