BGE: Random sensor will produce true random sequence of events when seed is set to 0 in the GUI (the actual seed value is stored in the sensor seed attribute). Positive values will use fixed pseudo random sequence.

source/gameengine/Converter/KX_ConvertSensors.cpp

@@ -682,6 +682,11 @@ void BL_ConvertSensors(struct Object* blenderobject,
 					if (eventmgr)
 					{
 						int randomSeed = blenderrndsensor->seed;
+						if (randomSeed == 0)
+						{
+							randomSeed = (int)(kxengine->GetRealTime()*100000.0);
+							randomSeed ^= (intptr_t)blenderrndsensor;
+						}
 						gamesensor = new SCA_RandomSensor(eventmgr, gameobj, randomSeed);
 					}
 				}

source/gameengine/Ketsji/KX_KetsjiEngine.cpp

@@ -1770,6 +1770,11 @@ double KX_KetsjiEngine::GetClockTime(void) const
 	return m_clockTime;
 }
 
+double KX_KetsjiEngine::GetRealTime(void) const
+{
+	return m_kxsystem->GetTimeInSeconds();
+}
+
 void KX_KetsjiEngine::SetAnimFrameRate(double framerate)
 {
 	m_anim_framerate = framerate;

source/gameengine/Ketsji/KX_KetsjiEngine.h

@@ -271,6 +271,7 @@ public:
 	 */
 	double GetClockTime(void) const;
 
+	double GetRealTime(void) const;
 	/**
 	 * Returns the difference between the local time of the scene (when it
 	 * was running and not suspended) and the "curtime"