Originally Posted by Sinnersis
I've also heard that Valve intend to end the Half-Life series with these three episodes, but then we've all heard similar statements / rumours from other studios before (e.g. Westwood, RIP, stated there would be NO sequel to C&C: Red Alert. We all know how that turned out :D ). So I'll first, wait and see how episode 3 ends before coming to any conclusions.
It has been stated that Valve that they consider episodes 1-3 to be Half-Life 3. They released it this way so that there wouldn't be another 5-6 year wait before "Half Life 3."
Either way, I'd like to see the series continue. After all it does have one of the most engaging "worlds" ever created for a computer game, or for that matter any media form.