May 24, 2017 Update: Epic's 4.16 version of UE4 has had its Steam SDK upgraded to v1.39. This is still one version short of the latest SDK (v1.40) at the time of this writing but its significantly more recent. They even added SteamController fixes. I'm not sure

This is the first step in a series of guides that will show you how to enable the OnlineSubsystemSteam module for your project. It does not cover session creation, session management, app id association, or anything specific to OnlineSubsystemSteam. These steps are the first part in enabling a Steam integration