Day of Defeat Levels
You must install the correct editor for Day of Defeat Level Creation (Hammer 3.4 or J.A.C.K.). Check out Holycow's Video on how to make the levels!
Need help with making maps? Go to the Day of Defeat store page. Check out the store and forums!
Why Certain Versions of Hammer Don't Work
Newer versions of Hammer don't work because they are for newer games that use Source. Newer versions of Hammer also don't have the same setup required to make goldsource maps. Therefore you must use older versions such as Hammer 3.4 and J.A.C.K. NOTE: Valve did not create J.A.C.K. They only created certain aspects of J.A.C.K. that make the program work.
Is There a video on how to make maps?
So your new to Day of Defeat and its map making aspects. All good, just watch Holycow's Video on it. Video