Already did a discussion like this on a another map made by Adam that requires Black Mesa to be mounted https://steamhost.cn/steamcommunity_com/workshop/filedetails/?id=2946460940 this collection has all content from Black Mesa so you don't have to take forever mounting it also the collection is 18 whole gb so if you don't have the space just mount it idc really. (also mounting Black Mesa gives your game a lot of issues I heard)