What's needed to play?

[shiroun]

What source game is required to play? I have all but CS:S (I bought orange box) and this won't show up in my game listing. Anyone have any ideas?

 

[SilentDeath]

this mod requires Half Life. Not any source game.

 

[Thothie]

To clarify: it doesn't require any Source game. It requires Half-Life 1.

You need to be sure it's installed. Also recommend running the training room to ensure all the bits download.