Steam Community :: Guide :: Opening Hammer Editor - The new update crashed the old way to open it
Hammer No Mercy Beat'N Bowling Balls FREE SHIPPING
How to get Valve Hammer Editor - YouTube
A message like this would've made some people disappointed, but the majority of the community would've understood. It's an act of good faith Valve could've taken. Some people are overacting, as always,
Left 4 Dead Authoring Tools | Left 4 Dead Wiki | Fandom
How to Use the basic tools of the Valve Hammer Map Editor « Software Tips :: WonderHowTo
L4D Level Design/Outdoor Levels - Valve Developer Community