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Half-Life 2 is currently 100% off for its 20th anniversary, plus a major update
(store.steampowered.com)
Bonus: it also seems that the episodes have been rolled into the base game. Full details of the anniversary update.
Weren't the two episodes free?
Maybe there was some special or package deal, but no.
Not unless they had some special bundle for HL2 I can't remember.
Ep1 had to be purchased. Ep2 came with The Orange Box (which also contained TF2 and Portal 1 as well as Richochet, though it wasn't advertised).
Pretty sure when Orange Box was released, it included HL2 and HL2 Episode 1 in addition to HL2 Episode 2. Hard to remember because there were so many good games that came from that one purchase.
I probably just remember EP2 only because it was released then and how I got it. I already had HL2 and ep1 at the time.
It did. Still does.