Condition Zero: Deleted Scenes is a game developed by Ritual Entertainment, which acts as an expansion pack to Counter-Strike: Condition Zero. It makes up a series of eighteen unconnected single-player missions, with blazing fast action and intense firefights. It includes new weapons and re-skinned and re-animated versions of Counter-Strike weapons.
I don't know, as Half-Life mod, CSCZDS pretty interesting (I liked the training part), but as full game... Also, it's a little buggy :(