diff --git a/rwengine/include/engine/GameWorld.hpp b/rwengine/include/engine/GameWorld.hpp
index 0b0c3714..ee72b334 100644
--- a/rwengine/include/engine/GameWorld.hpp
+++ b/rwengine/include/engine/GameWorld.hpp
@@ -23,8 +23,6 @@ class VehicleObject;
 
 struct WeaponScan;
 
-class ScriptMachine;
-
 #include <glm/glm.hpp>
 
 #include <btBulletDynamicsCommon.h>
@@ -70,8 +68,6 @@ public:
 	 */
 	bool defineItems(const std::string& name);
 
-	void runScript(const std::string& name);
-	
 	/**
 	 * Loads an IPL into the game.
 	 * @param name The name of the IPL as it appears in the games' gta.dat
@@ -241,8 +237,6 @@ public:
 	 */
 	WorkContext* _work;
 
-	ScriptMachine* script;
-
 	/**
 	 * @brief Loads and starts the named cutscene.
 	 * @param name
diff --git a/rwengine/include/script/ScriptMachine.hpp b/rwengine/include/script/ScriptMachine.hpp
index f9da947b..63aa945b 100644
--- a/rwengine/include/script/ScriptMachine.hpp
+++ b/rwengine/include/script/ScriptMachine.hpp
@@ -6,6 +6,7 @@
 #include <iomanip>
 #include <string>
 #include <stack>
+#include <set>
 
 #define SCM_NEGATE_CONDITIONAL_MASK 0x8000
 #define SCM_CONDITIONAL_MASK_PASSED 0xFF
@@ -130,18 +131,20 @@ struct SCMThread
 	std::stack<pc_t> calls;
 };
 
+/**
+ * Breakpoint callback information
+ */
+struct SCMBreakpoint
+{
+	SCMThread::pc_t pc;
+	SCMThread* thread;
+	ScriptMachine* vm;
+	ScriptFunctionMeta* function;
+	ScriptArguments* args;
+};
+
 class ScriptMachine
 {
-	SCMFile* _file;
-	SCMOpcodes* _ops;
-	GameWorld* _world;
-
-	std::vector<SCMThread> _activeThreads;
-
-	void executeThread(SCMThread& t, int msPassed);
-
-	SCMByte* _globals;
-
 public:
 	ScriptMachine(GameWorld* world, SCMFile* file, SCMOpcodes* ops);
 	~ScriptMachine();
@@ -153,11 +156,32 @@ public:
 	SCMByte* getGlobals();
 
 	GameWorld* getWorld() const { return _world; }
+	
+	typedef std::function<void (const SCMBreakpoint&)> BreakpointHandler;
+
+	void setBreakpointHandler(const BreakpointHandler& handler);
+
+	void addBreakpoint(SCMThread::pc_t pc);
+	void removeBreakpoint(SCMThread::pc_t pc);
 
 	/**
 	 * @brief executes threads until they are all in waiting state.
 	 */
 	void execute(float dt);
+	
+private:
+	SCMFile* _file;
+	SCMOpcodes* _ops;
+	GameWorld* _world;
+
+	std::vector<SCMThread> _activeThreads;
+
+	void executeThread(SCMThread& t, int msPassed);
+
+	SCMByte* _globals;
+
+	BreakpointHandler bpHandler;
+	std::set<SCMThread::pc_t> breakpoints;
 };
 
 #endif
diff --git a/rwengine/src/engine/GameWorld.cpp b/rwengine/src/engine/GameWorld.cpp
index 7dfb6d46..da077efc 100644
--- a/rwengine/src/engine/GameWorld.cpp
+++ b/rwengine/src/engine/GameWorld.cpp
@@ -11,11 +11,6 @@
 #include <data/WeaponData.hpp>
 #include <WorkContext.hpp>
 
-#include <script/ScriptMachine.hpp>
-#include <script/modules/VMModule.hpp>
-#include <script/modules/GameModule.hpp>
-#include <script/modules/ObjectModule.hpp>
-
 // 3 isn't enough to cause a factory.
 #include <objects/CharacterObject.hpp>
 #include <objects/InstanceObject.hpp>
@@ -80,7 +75,7 @@ public:
 
 GameWorld::GameWorld(Logger* log, const std::string& path)
 	: logger(log), gameTime(0.f), gameData(log, path), randomEngine(rand()),
-	  _work( new WorkContext( this ) ), script(nullptr), cutsceneAudio(nullptr), missionAudio(nullptr),
+	  _work( new WorkContext( this ) ), cutsceneAudio(nullptr), missionAudio(nullptr),
 	  paused(false)
 {
 	gameData.engine = this;
@@ -144,24 +139,6 @@ bool GameWorld::defineItems(const std::string& name)
 	return false;
 }
 
-void GameWorld::runScript(const std::string &name)
-{
-	SCMFile* f = gameData.loadSCM(name);
-	if( f ) {
-		if( script ) delete script;
-		
-		SCMOpcodes* opcodes = new SCMOpcodes;
-		opcodes->modules.push_back(new VMModule);
-		opcodes->modules.push_back(new GameModule);
-		opcodes->modules.push_back(new ObjectModule);
-
-		script = new ScriptMachine(this, f, opcodes);
-	}
-	else {
-		logger->error("World", "Failed to load SCM: " + name);
-	}
-}
-
 bool GameWorld::placeItems(const std::string& name)
 {
 	auto i = gameData.iplLocations.find(name);
diff --git a/rwengine/src/script/ScriptMachine.cpp b/rwengine/src/script/ScriptMachine.cpp
index 45aa41db..120b4b5c 100644
--- a/rwengine/src/script/ScriptMachine.cpp
+++ b/rwengine/src/script/ScriptMachine.cpp
@@ -29,26 +29,13 @@ bool SCMOpcodes::findOpcode(ScriptFunctionID id, ScriptFunctionMeta** out)
 
 void ScriptMachine::executeThread(SCMThread &t, int msPassed)
 {
-#if SCM_DEBUG_INSTRUCTIONS
-	std::string threadfilter;
-	if(getenv("SCM_DEBUG_THREAD"))
-	{
-		threadfilter = getenv("SCM_DEBUG_THREAD");
-	}
-	
-	bool debug_op = threadfilter.empty() || threadfilter.find(t.name) != std::string::npos || threadfilter.find(std::to_string(t.baseAddress)) != std::string::npos;
-	
-	if ( debug_op )
-	{
-		_world->logger.verbose("SCM", "Thread " + t.name + " woke at " + std::to_string(t.wakeCounter) );
-	}
-#endif
-	
 	if( t.wakeCounter > 0 ) {
 		t.wakeCounter = std::max( t.wakeCounter - msPassed, 0 );
 	}
 	if( t.wakeCounter > 0 ) return;
 	
+	bool hasDebugging = !! bpHandler;
+	
 	while( t.wakeCounter == 0 ) {
 		auto opcode = _file->read<SCMOpcode>(t.programCounter);
 		auto opcorg = opcode;
@@ -63,6 +50,8 @@ void ScriptMachine::executeThread(SCMThread &t, int msPassed)
 		}
 		ScriptFunctionMeta& code = *foundcode;
 		
+		// Keep the pc for the debugger
+		auto pc = t.programCounter;
 		t.programCounter += sizeof(SCMOpcode);
 
 		SCMParams parameters;
@@ -126,81 +115,25 @@ void ScriptMachine::executeThread(SCMThread &t, int msPassed)
 			};
 		}
 
-		if(! code.function)
+		if(code.function)
 		{
-#if SCM_DEBUG_INSTRUCTIONS
-			std::cout << std::setw(7) << std::setfill(' ') << t.name <<
-			" " << std::dec << std::setw(8) << std::setfill(' ') << t.programCounter <<
-			" " << std::hex  << std::setw(4) << std::setfill('0') << opcorg << 
-			" " << std::dec;
-			for(SCMOpcodeParameter& p : parameters) {
-				std::cout << p.type << ":";
-				switch(p.type) {
-					case TGlobal:
-					case TLocal:
-						std::cout << *p.globalInteger;
-						break;
-					case TInt8:
-					case TInt16:
-					case TInt32:
-						std::cout << p.integer;
-						break;
-					case TFloat16:
-						std::cout << p.real;
-						break;
-					case TString:
-						std::cout << p.string;
-						break;
-				}
-				std::cout << " ";
-			}
-			std::cout << code.signature  << " unimplemented"<< std::endl;
-#endif
-		}
-		else
-		{
-#if SCM_DEBUG_INSTRUCTIONS
-			if( debug_op )
-			{
-				std::cout << std::setw(7) << std::setfill(' ') << t.name <<
-				" " << std::dec << std::setw(8) << std::setfill(' ') << t.programCounter <<
-				" " << std::hex  << std::setw(4) << std::setfill('0') << opcorg << 
-				" " << std::dec;
-				for(SCMOpcodeParameter& p : parameters) {
-					std::cout << p.type << ":";
-					switch(p.type) {
-						case TGlobal:
-						case TLocal:
-							std::cout << *p.globalInteger << "(" << p.globalInteger << ")";
-							break;
-						case TInt8:
-						case TInt16:
-						case TInt32:
-							std::cout << p.integer;
-							break;
-						case TFloat16:
-							std::cout << p.real;
-							break;
-						case TString:
-							std::cout << p.string;
-							break;
-					}
-					std::cout << " ";
-				}
-				std::cout << code.signature << std::endl;
-			}
-#endif
 			ScriptArguments sca(&parameters, &t, this);
-			code.function(sca);
-#if SCM_DEBUG_INSTRUCTIONS
-			if( debug_op )
+			
+			if( hasDebugging )
 			{
-				if( code.conditional )
+				if( breakpoints.find(pc) != breakpoints.end() )
 				{
-					std::cout << " => " << t.conditionResult << std::endl;
+					SCMBreakpoint bp;
+					bp.pc = pc;
+					bp.thread = &t;
+					bp.vm = this;
+					bp.function = &code;
+					bp.args = &sca;
+					bpHandler(bp);
 				}
 			}
-#endif
+			
+			code.function(sca);
 		}
 
 		if(isNegatedConditional) {
@@ -299,3 +232,20 @@ void ScriptMachine::execute(float dt)
 		}
 	}
 }
+
+void ScriptMachine::setBreakpointHandler(const ScriptMachine::BreakpointHandler& handler)
+{
+	bpHandler = handler;
+}
+
+void ScriptMachine::addBreakpoint(SCMThread::pc_t pc)
+{
+	breakpoints.insert(pc);
+}
+
+void ScriptMachine::removeBreakpoint(SCMThread::pc_t pc)
+{
+	breakpoints.erase(pc);
+}
+
+
diff --git a/rwgame/RWGame.cpp b/rwgame/RWGame.cpp
index e4899ba5..9e9008d7 100644
--- a/rwgame/RWGame.cpp
+++ b/rwgame/RWGame.cpp
@@ -10,7 +10,11 @@
 #include <engine/GameWorld.hpp>
 #include <render/GameRenderer.hpp>
 #include <render/DebugDraw.hpp>
+
 #include <script/ScriptMachine.hpp>
+#include <script/modules/VMModule.hpp>
+#include <script/modules/GameModule.hpp>
+#include <script/modules/ObjectModule.hpp>
 
 #include <data/CutsceneData.hpp>
 #include <ai/PlayerController.hpp>
@@ -22,12 +26,13 @@ DebugDraw* debug;
 StdOutReciever logPrinter;
 
 RWGame::RWGame(const std::string& gamepath, int argc, char* argv[])
-	: engine(nullptr), renderer(nullptr), inFocus(true), showDebugStats(false),
+	: engine(nullptr), renderer(nullptr), script(nullptr), inFocus(true), showDebugStats(false),
 	  accum(0.f), timescale(1.f)
 {
 	size_t w = GAME_WINDOW_WIDTH, h = GAME_WINDOW_HEIGHT;
 	bool fullscreen = false;
 	bool newgame = false;
+	bool debugscript = false;
 
 	for( int i = 1; i < argc; ++i )
 	{
@@ -47,6 +52,10 @@ RWGame::RWGame(const std::string& gamepath, int argc, char* argv[])
 		{
 			newgame = true;
 		}
+		if( strcmp( "--debug", argv[i] ) == 0 )
+		{
+			debugscript = true;
+		}
 	}
 	
 	
@@ -128,10 +137,51 @@ RWGame::RWGame(const std::string& gamepath, int argc, char* argv[])
 
 RWGame::~RWGame()
 {
+	delete script;
 	delete renderer;
 	delete engine;
 }
 
+void RWGame::startScript(const std::string& name)
+{
+	SCMFile* f = engine->gameData.loadSCM(name);
+	if( f ) {
+		if( script ) delete script;
+		
+		SCMOpcodes* opcodes = new SCMOpcodes;
+		opcodes->modules.push_back(new VMModule);
+		opcodes->modules.push_back(new GameModule);
+		opcodes->modules.push_back(new ObjectModule);
+
+		script = new ScriptMachine(engine, f, opcodes);
+		
+		// Set up breakpoint handler
+		script->setBreakpointHandler(
+			[&](const SCMBreakpoint& bp)
+			{
+				log.info("Script", "Breakpoint hit!");
+				std::stringstream ss;
+				ss << " " << bp.function->description << ".";
+				ss << " Args:";
+				for(int a = 0; a < bp.args->getParameters().size(); a++)
+				{
+					auto& arg = bp.args->getParameters()[a];
+					ss << " " << arg.integerValue();
+					if( a != bp.args->getParameters().size()-1 )
+					{
+						ss << ",";
+					}
+				}
+				
+				log.info("Script", ss.str());
+			});
+		script->addBreakpoint(0);
+	}
+	else {
+		log.error("Game", "Failed to load SCM: " + name);
+	}
+}
+
 int RWGame::run()
 {
 	clock.restart();
@@ -250,9 +300,9 @@ void RWGame::tick(float dt)
 
 		engine->dynamicsWorld->stepSimulation(dt, 2, dt);
 		
-		if( engine->script ) {
+		if( script ) {
 			try {
-				engine->script->execute(dt);
+				script->execute(dt);
 			}
 			catch( SCMException& ex ) {
 				std::cerr << ex.what() << std::endl;
diff --git a/rwgame/RWGame.hpp b/rwgame/RWGame.hpp
index 4a459d56..301bb4ee 100644
--- a/rwgame/RWGame.hpp
+++ b/rwgame/RWGame.hpp
@@ -4,6 +4,7 @@
 #include <core/Logger.hpp>
 #include <engine/GameWorld.hpp>
 #include <render/GameRenderer.hpp>
+#include <script/ScriptMachine.hpp>
 #include "game.hpp"
 
 #include <SFML/Graphics.hpp>
@@ -14,6 +15,7 @@ class RWGame
 	GameWorld* engine;
 	// must be allocated after Logger setup.
 	GameRenderer* renderer;
+	ScriptMachine* script;
 	sf::RenderWindow window;
 	sf::Clock clock;
 	bool inFocus;
@@ -45,6 +47,11 @@ public:
 		return window;
 	}
 
+	ScriptMachine* getScript() const
+	{
+		return script;
+	}
+
 	bool hitWorldRay(glm::vec3 &hit, glm::vec3 &normal, GameObject** object = nullptr)
 	{
 		auto vc = nextCam;
@@ -74,6 +81,8 @@ public:
 		}
 		return false;
 	}
+	
+	void startScript(const std::string& name);
 
 private:
 	void tick(float dt);
diff --git a/rwgame/ingamestate.cpp b/rwgame/ingamestate.cpp
index 399ed791..219bcf52 100644
--- a/rwgame/ingamestate.cpp
+++ b/rwgame/ingamestate.cpp
@@ -11,6 +11,7 @@
 #include <render/Model.hpp>
 #include <items/WeaponItem.hpp>
 #include <engine/GameWorld.hpp>
+#include <script/ScriptMachine.hpp>
 
 #define AUTOLOOK_TIME 2.f
 
@@ -68,7 +69,7 @@ void IngameState::startTest()
 
 void IngameState::startGame()
 {
-	getWorld()->runScript("data/main.scm");
+	game->startScript("data/main.scm");	
 	getWorld()->sound.playBackground( getWorld()->gameData.getDataPath() + "/audio/City.wav" );
 }