You’re doing it right: Black Mesa trailer may cause joy, erection

As well as being a great developer in their own right, Valve is also lucky to have one of the biggest modding communities on the internet. Some mods can be small things, or other may be big projects like this. I’m sure that you’ve already heard about Black Mesa: Source, but if you haven’t, here’s what the project is about. Also make sure to watch the trailer above.