It's certainly nice that you can study this code freely, but that isn't a good reason for anyone to use it. The restriction stating that "you can only use this

It's certainly nice that you can study this code freely, but that isn't a good reason for anyone to use it. The restriction stating that "you can only use this to make mods of valve games" seems particularly ridiculous. For indie developers, there are plenty of free (as in freedom) replacements that are probably better to use. https://en.wikipedia.org/wiki/List_of_game_engines#Free_and_open_source https://en.wikipedia.org/wiki/List_of_game_engines#Free_and_... For one, a properly free game engine will allow you to develop actual games, not just Half Life and Team Fortress mods.