diff --git a/sp/src/game/server/mapbase/logic_substring.cpp b/sp/src/game/server/mapbase/logic_substring.cpp
new file mode 100644
index 00000000..7c7d153b
--- /dev/null
+++ b/sp/src/game/server/mapbase/logic_substring.cpp
@@ -0,0 +1,110 @@
+//====================== By Holly Liberatore / MoofEMP ======================//
+//
+// Purpose: Takes a string parameter and returns a substring defined by keyvalues
+//
+//===========================================================================//
+
+#include "cbase.h"
+
+#define SF_SUBSTRING_START_DISABLED (1 << 0)
+
+class CLogicSubstring : public CLogicalEntity
+{
+public: 
+	DECLARE_CLASS( CLogicSubstring, CLogicalEntity );
+	DECLARE_DATADESC();
+
+	CLogicSubstring( void ) { }
+	
+	void InputDisable( inputdata_t &inputData );
+	void InputEnable( inputdata_t &inputData );
+	void InputInValue( inputdata_t &inputData );
+	void InputSetLength( inputdata_t &inputData );
+	void InputSetStartPos( inputdata_t &inputData );
+	
+	void Spawn(void);
+
+private:
+	int m_nLength;
+	int m_nStartPos;
+
+	bool m_bEnabled;
+
+	COutputString	m_OutValue;
+};
+
+LINK_ENTITY_TO_CLASS( logic_substring, CLogicSubstring );
+
+BEGIN_DATADESC( CLogicSubstring )
+	
+	DEFINE_FIELD( m_bEnabled, FIELD_BOOLEAN ),
+
+	DEFINE_KEYFIELD(m_nLength, FIELD_INTEGER, "length" ),
+	DEFINE_KEYFIELD(m_nStartPos, FIELD_INTEGER, "startPos" ),
+
+	DEFINE_INPUTFUNC( FIELD_VOID, "Disable", InputDisable ),
+	DEFINE_INPUTFUNC( FIELD_VOID, "Enable", InputEnable ),
+	DEFINE_INPUTFUNC( FIELD_STRING, "InValue", InputInValue ),
+	DEFINE_INPUTFUNC( FIELD_INTEGER, "SetLength", InputSetLength ),
+	DEFINE_INPUTFUNC( FIELD_INTEGER, "SetStartPos", InputSetStartPos ),
+
+	DEFINE_OUTPUT( m_OutValue, "OutValue" ),
+
+END_DATADESC()
+
+//-----------------------------------------------------------------------------
+// Purpose: Disable or enable the entity (disabling prevents any input functions from running)
+//-----------------------------------------------------------------------------
+void CLogicSubstring::InputDisable( inputdata_t &inputData ) { m_bEnabled = false; }
+void CLogicSubstring::InputEnable ( inputdata_t &inputData ) { m_bEnabled = true ; }
+
+//-----------------------------------------------------------------------------
+// Purpose: Trim substring from input
+// Output: Substring
+//-----------------------------------------------------------------------------
+void CLogicSubstring::InputInValue( inputdata_t &inputData )
+{
+	if( !m_bEnabled ) return;
+
+	int inputLength = Q_strlen(inputData.value.String());
+	int startPosCheck = m_nStartPos < 0 ? inputLength + m_nStartPos : m_nStartPos;
+	if( startPosCheck < 0 )
+	{
+		startPosCheck = 0;
+	}
+	int lengthCheck = (m_nLength < 0 || m_nLength > inputLength - startPosCheck ? inputLength - startPosCheck : m_nLength) + 1;
+	if( lengthCheck < 1 || startPosCheck > inputLength )
+	{
+		m_OutValue.Set( MAKE_STRING(""), inputData.pActivator, this );
+		return;
+	}
+	char* strOutValue = (char*)malloc( lengthCheck );
+	Q_strncpy( strOutValue, inputData.value.String() + startPosCheck, lengthCheck );
+	m_OutValue.Set( AllocPooledString(strOutValue), inputData.pActivator, this );
+	free(strOutValue);
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Setter methods for keyvalues
+//-----------------------------------------------------------------------------
+void CLogicSubstring::InputSetLength( inputdata_t &inputData )
+{
+	if( !m_bEnabled ) return;
+
+	m_nLength = inputData.value.Int();
+}
+
+void CLogicSubstring::InputSetStartPos( inputdata_t &inputData )
+{
+	if( !m_bEnabled ) return;
+
+	m_nStartPos = inputData.value.Int();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Respond to spawnflags when entity spawns
+//-----------------------------------------------------------------------------
+void CLogicSubstring::Spawn( void )
+{
+	m_bEnabled = !HasSpawnFlags( SF_SUBSTRING_START_DISABLED );
+}