Chaos NOOB guide with pictures.
Please refer anyone not getting it to work to this post.
step 1 download the source from github.(make sure to get the branch 4.25-plus) NOTE: i tried with all 4.25 branches. 4.25-plus is the one that i got to work.
none of the other branches seemed to compile so now you know the secret.
extract that to the ROOT of a drive and make sure it does not have a folder in a folder like
d:\ue4\ue4 otherwise adding the demo project wont add it to the right location add it to the folder you extracted as victor said will not put it in the right folder. so cut and paste the files
to be in the root drive in a folder. i named mine UES4.25 this stands for unreal engine source 4.25
after that in the launcher make a destruction demo project for 4.25 DONOT CHANGE THE NAME…
now move that folder once finished inside your UES4.25 folder and you will see this below
Now find the file called UE4Editor.Target.cs (most important step here)
make it say the following code add the 2 red lines below to that file
// Copyright Epic Games, Inc. All Rights Reserved.
using UnrealBuildTool;
using System.Collections.Generic;
public class UE4EditorTarget : TargetRules
{
public UE4EditorTarget( TargetInfo Target ) : base(Target)
{
Type = TargetType.Editor;
BuildEnvironment = TargetBuildEnvironment.Shared;
bBuildAllModules = true;
ExtraModuleNames.Add("UE4Game");
bCompileChaos = true;
bUseChaos = true;
}
}
SAVE THE FILES CHANGES then proceed below
now click on setup.bat, it will take a while to download dependencies depending on your net
speed it can take a while.
WAIT till the download finishes and the command prompt closes
before you proceed below
after the prompt goes away then click generateprojectfiles.bat. it will then add a few things and an UE4.sln
it may just be called UE4 if you have file extentions hidden like windows does by default.
now open the UE4.sln it will load visual studio.
if you DONT see chaos destruction demo in visual studio like in this image below then your chaos demo folder is not in the right place.
](filedata/fetch?id=1780037&d=1592991873)
click at the top where it says build like in this image and click build solution
](filedata/fetch?id=1780038&d=1592991937)
let it build. it will take an hour or 3 or 15 hours depending on the paper weight PC you are using. 
after that is done goto the destructiondemo.uproject file
rightclick it and goto switch engine versions and switch it to the source build of 4.25
after that is done click the project file and it will run! bing bang boom now in the editor modes you have chaos
](filedata/fetch?id=1780040&d=1592992587) ](filedata/fetch?id=1780041&d=1592992645)
GG you GOT IT!
HERE is your step by step guide, now don’t choke on the silver spoon feeding please