Initial proof-of-concept.

.gitignore

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+# RoboRecall Mods
+*.robo

Engine/Binaries/ThirdParty/OpenVR/OpenVR.tps

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+<?xml version="1.0" encoding="utf-8"?>
+<TpsData xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+<Notification>
+Redirect: ../../../Source/ThirdParty/OpenVR/OpenVR.tps
+Notes:
+</Notification>
+</TpsData>

Engine/Source/ThirdParty/OpenVR/OpenVR.build.cs

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+// Copyright 1998-2017 Epic Games, Inc. All Rights Reserved.
+
+using System;
+using System.IO;
+using UnrealBuildTool;
+
+public class OpenVR : ModuleRules
+{
+	public OpenVR(TargetInfo Target)
+	{
+		/** Mark the current version of the OpenVR SDK */
+		string OpenVRVersion = "v1_0_2";
+		Type = ModuleType.External;
+
+		string SdkBase = UEBuildConfiguration.UEThirdPartySourceDirectory + "OpenVR/OpenVR" + OpenVRVersion;
+		if (!Directory.Exists(SdkBase))
+		{
+			string Err = string.Format("OpenVR SDK not found in {0}", SdkBase);
+			System.Console.WriteLine(Err);
+			throw new BuildException(Err);
+		}
+
+		PublicIncludePaths.Add(SdkBase + "/headers");
+
+		string LibraryPath = SdkBase + "/lib/";
+
+		if(Target.Platform == UnrealTargetPlatform.Win32)
+		{
+			PublicLibraryPaths.Add(LibraryPath + "win32");
+			PublicAdditionalLibraries.Add("openvr_api.lib");
+			PublicDelayLoadDLLs.Add("openvr_api.dll");
+
+			string OpenVRBinariesDir = String.Format("$(EngineDir)/Binaries/ThirdParty/OpenVR/OpenVR{0}/Win32/", OpenVRVersion);
+			RuntimeDependencies.Add(new RuntimeDependency(OpenVRBinariesDir + "openvr_api.dll"));
+		}
+		else if(Target.Platform == UnrealTargetPlatform.Win64)
+		{
+			PublicLibraryPaths.Add(LibraryPath + "win64");
+			PublicAdditionalLibraries.Add("openvr_api.lib");
+			PublicDelayLoadDLLs.Add("openvr_api.dll");
+
+			string OpenVRBinariesDir = String.Format("$(EngineDir)/Binaries/ThirdParty/OpenVR/OpenVR{0}/Win64/", OpenVRVersion);
+			RuntimeDependencies.Add(new RuntimeDependency(OpenVRBinariesDir + "openvr_api.dll"));
+		}
+		else if (Target.Platform == UnrealTargetPlatform.Mac)
+		{
+			string DylibPath = SdkBase + "/bin/osx32/libopenvr_api.dylib";
+			PublicDelayLoadDLLs.Add(DylibPath);
+			PublicAdditionalShadowFiles.Add(DylibPath);
+
+			string OpenVRBinariesDir = String.Format("$(EngineDir)/Binaries/ThirdParty/OpenVR/OpenVR{0}/osx32/", OpenVRVersion);
+			RuntimeDependencies.Add(new RuntimeDependency(OpenVRBinariesDir + "libopenvr_api.dylib"));
+		}
+	}
+}

Engine/Source/ThirdParty/OpenVR/OpenVR.tps

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+<?xml version="1.0" encoding="utf-8"?>
+<TpsData xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <Name>OpenVR</Name>
+  <Location>/Engine/Source/ThirdParty/OpenVR/</Location>
+  <Date>2016-06-13T16:27:50.6824692-04:00</Date>
+  <Function>Valve's OpenVR SDK - API for SteamVR, including their HMD and Controllers as well as their support for DK2, etc.</Function>
+  <Justification>We need to support the SteamVR hardware.</Justification>
+  <Eula>https://github.com/ValveSoftware/openvr/blob/master/LICENSE</Eula>
+  <RedistributeTo>
+    <EndUserGroup>Licensees</EndUserGroup>
+    <EndUserGroup>Git</EndUserGroup>
+    <EndUserGroup>P4</EndUserGroup>
+  </RedistributeTo>
+  <LicenseFolder>/Engine/Source/ThirdParty/Licenses/OpenVR_License.txt</LicenseFolder>
+</TpsData>

Engine/Source/ThirdParty/OpenVR/OpenVRv000/LICENSE

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+Copyright (c) 2015, Valve Corporation
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors
+may be used to endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.