I don't know why they didn't do this years ago after Half-Life 2 first came out. I remember thinking for sure that just like with Half-Life they released Opposi

I don't know why they didn't do this years ago after Half-Life 2 first came out. I remember thinking for sure that just like with Half-Life they released Opposing Force and Blue Shift (which were both, admittedly, not planned for when the original HL was released) they would be releasing expansions with Alyx and Barney.