For this competition, we asked entrants to make maps inspired by the Doom series.
This is a Source mod that uses Mapbase and Source 2013 Singleplayer SDK. To install, place the "halloweenhorror4" and "mapbase" folders inside your "sourcemods" folder which can be found under "C:\Program Files (x86)\Steam\steamapps\sourcemods" if you are using the default Steam install path. Adjust as necessary.
Then you need to make sure you have installed "Source SDK Base 2013 Singleplayer" under the tools section of your steam library, then you also need to make sure that you have set it to the "upcoming" beta. You can do this via right clicking on the SDK, selecting "Properties", then "Betas" and lastly selecting "upcoming".
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it won't even launch, it's a black screen and then it tabs out
You need to install Source SDK Base 2013 Singleplayer, right click it in Steam, select “Properties”, then select the Betas tab. Make sure it’s set to the “upcoming” beta.
did all that. other map labs work before the mapbase thing was added.
did you install mapbase in the first place then? Using a non-included version most likely won't work
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i like that map:
-Combine Mars Takeover