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diff --git a/public/tier1/uniqueid.h b/public/tier1/uniqueid.h
new file mode 100644
index 0000000..fd3fe26
--- /dev/null
+++ b/public/tier1/uniqueid.h
@@ -0,0 +1,56 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+// Utilities for globally unique IDs
+//=============================================================================//
+
+#ifndef UNIQUEID_H
+#define UNIQUEID_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier1/utlvector.h"
+
+
+//-----------------------------------------------------------------------------
+// Forward declarations
+//-----------------------------------------------------------------------------
+struct UniqueId_t;
+class CUtlBuffer;
+
+
+//-----------------------------------------------------------------------------
+// Defines a globally unique ID
+//-----------------------------------------------------------------------------
+struct UniqueId_t
+{
+	unsigned char m_Value[16];
+};
+
+
+//-----------------------------------------------------------------------------
+// Methods related to unique ids
+//-----------------------------------------------------------------------------
+void CreateUniqueId( UniqueId_t *pDest );
+void InvalidateUniqueId( UniqueId_t *pDest );
+bool IsUniqueIdValid( const UniqueId_t &id );
+bool IsUniqueIdEqual( const UniqueId_t &id1, const UniqueId_t &id2 );
+void UniqueIdToString( const UniqueId_t &id, char *pBuf, int nMaxLen );
+bool UniqueIdFromString( UniqueId_t *pDest, const char *pBuf, int nMaxLen = 0 );
+void CopyUniqueId( const UniqueId_t &src, UniqueId_t *pDest );
+bool Serialize( CUtlBuffer &buf, const UniqueId_t &src );
+bool Unserialize( CUtlBuffer &buf, UniqueId_t &dest );
+
+inline bool operator ==( const UniqueId_t& lhs, const UniqueId_t& rhs )
+{
+	return !Q_memcmp( (void *)&lhs.m_Value[ 0 ], (void *)&rhs.m_Value[ 0 ], sizeof( lhs.m_Value ) );
+}
+
+
+#endif // UNIQUEID_H
+