Step 1
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Go to the folder where your Epic Games Overlay is stored.
Should look somthing like

-C:\Epic Games\Launcher\Portal\Extras\Overlay\
--drop the folder Epic Overlay Bk inside
---Select all the content inside and drop it into that Bk folder
your done with it, exit.

Step 2
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Open steam, in the very bottom corner select "add a game"
select "add non steam game"
navigate to where your Epic games launcher is and select it
for me its C:\Epic Games\Launcher\Engine\Binaries\Win64\EpicGamesLauncher

Right click on EpicGamesLauncher in your Library and make sure its toggled to on.

You will now be able to launch Epic Launcher from steam, Launch Alan Wake, and Steam Overlay will be working. 
