Compilers forValve Hammer Editor -fourconsole, small programsthat convertthe formatofthe map. MAP (source)insize. BSP (friendlygame).Also, thesecompilersare calledproUtilities, known asthe developer.Sincethe source code forutilitiesis open,thenthere are people whohave improvedthem andadded new features.So there wereutilitiesZHLT: Custom Build,which can be consideredmore successfulthan theoriginalZHLT.