This removes the annoying pop-up that shows up whenever you attempt to start the game:

1. Download SteamEdit[steamedit.tg-software.com] and open it
2. Select No More Room in Hell from the dropdown menu

 
3. Hit "Edit Launch"
4. Hit "Delete" on the second entry

 
5. Hit "OK"
6. Hit "Save & Refresh"

Steam should restart. If not, do it manually. You are done.

If you wish to undo this change:

1. Repeat the first 3 steps
2. Click "Add new"
3. Use these strings:


5. Hit "OK"
6. Hit "Save & Refresh"

If you ever feel like using Hammer:

1. Right-click No More Room in Hell in your library.
2. Local Files tab > Browse local files.
3. Go into "sdk/bin".
4. Create a shortcut to "Hammer.bat" and place it somewhere.