Half Life 2 isn't mounted, need help!

[Catly]

I've wanted to play Obsidian Conflict but Half Life 2 isn't mounted. I allready mounted Episode 1, 2 and lost cost. I tried to start a hl2 level and in the console it said that it didn't find the map. If I try starting a Episode 1 map it works fine. Thanks in advance

[MaestraFénix]

(Whoops, quite late)
Make sure you ran the mountfix after installing all the games and the SDK Base 2007. Also, the HL2 Anniversary update seems to have messed up some stuff, so make sure you change the branches into legacy.