From b4cd5591865930b89a5d10d5a8f9365032bf6388 Mon Sep 17 00:00:00 2001
From: Nicholas Hastings <skamonkey@gmail.com>
Date: Tue, 29 Oct 2013 19:00:21 -0400
Subject: [PATCH] Fix GetEngineVersion ret values for MM:S 1.9.x on orangebox
 (bug 5967, r=asherkin).

---
 core/smn_halflife.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/core/smn_halflife.cpp b/core/smn_halflife.cpp
index 722564aa..ba668cc7 100644
--- a/core/smn_halflife.cpp
+++ b/core/smn_halflife.cpp
@@ -509,7 +509,23 @@ static cell_t GuessSDKVersion(IPluginContext *pContext, const cell_t *params)
 
 static cell_t GetEngineVersion(IPluginContext *pContext, const cell_t *params)
 {
-	return g_SMAPI->GetSourceEngineBuild();
+	int engineVer = g_SMAPI->GetSourceEngineBuild();
+#if defined METAMOD_PLAPI_VERSION
+	if (engineVer == SOURCE_ENGINE_ORANGEBOXVALVE_DEPRECATED)
+	{
+		const char *gamedir = g_SourceMod.GetGameFolderName();
+		if (strcmp(gamedir, "tf") == 0)
+			return SOURCE_ENGINE_TF2;
+		else if (strcmp(gamedir, "cstrike") == 0)
+			return SOURCE_ENGINE_CSS;
+		else if (strcmp(gamedir, "dod") == 0)
+			return SOURCE_ENGINE_DODS;
+		else if (strcmp(gamedir, "hl2mp") == 0)
+			return SOURCE_ENGINE_HL2DM;
+	}
+#endif
+
+	return engineVer;
 }
 
 static cell_t IndexToReference(IPluginContext *pContext, const cell_t *params)