diff --git a/engines/mtropolis/miniscript.cpp b/engines/mtropolis/miniscript.cpp
index c565cbbc755..5925b0bdbc9 100644
--- a/engines/mtropolis/miniscript.cpp
+++ b/engines/mtropolis/miniscript.cpp
@@ -22,6 +22,7 @@
 #include "mtropolis/miniscript.h"
 #include "common/config-manager.h"
 
+#include "common/random.h"
 #include "common/memstream.h"
 
 namespace MTropolis {
@@ -858,6 +859,245 @@ MiniscriptInstructionOutcome OrderedCompareInstruction::execute(MiniscriptThread
 BuiltinFunc::BuiltinFunc(BuiltinFunctionID bfid) : _funcID(bfid) {
 }
 
+MiniscriptInstructionOutcome BuiltinFunc::execute(MiniscriptThread *thread) const {
+	size_t stackArgsNeeded = 1;
+	bool returnsValue = true;
+
+	if (thread->getStackSize() < stackArgsNeeded) {
+		thread->error("Stack underflow");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	for (size_t i = 0; i < stackArgsNeeded; i++) {
+		MiniscriptInstructionOutcome outcome = thread->dereferenceRValue(i, false);
+		if (outcome != kMiniscriptInstructionOutcomeContinue)
+			return outcome;
+	}
+
+	DynamicValue staticDest;
+	DynamicValue *dest = nullptr;
+
+	if (returnsValue) {
+		if (stackArgsNeeded > 0)
+			dest = &thread->getStackValueFromTop(stackArgsNeeded - 1).value;
+		else
+			dest = &staticDest;
+	}
+
+	MiniscriptInstructionOutcome outcome = executeFunction(thread, dest);
+	if (outcome != kMiniscriptInstructionOutcomeContinue)
+		return outcome;
+
+	if (stackArgsNeeded > 0) {
+		size_t valuesToPop = stackArgsNeeded;
+		if (returnsValue)
+			valuesToPop--;
+
+		if (valuesToPop > 0)
+			thread->popValues(valuesToPop);
+	} else {
+		if (returnsValue)
+			thread->pushValue(staticDest);
+	}
+
+	return kMiniscriptInstructionOutcomeContinue;
+}
+
+MiniscriptInstructionOutcome BuiltinFunc::executeFunction(MiniscriptThread *thread, DynamicValue *returnValue) const {
+	switch (_funcID) {
+	case kSin:
+	case kCos:
+	case kRandom:
+	case kSqrt:
+	case kTan:
+	case kAbs:
+	case kSign:
+	case kArctangent:
+	case kExp:
+	case kLn:
+	case kLog:
+	case kCosH:
+	case kSinH:
+	case kTanH:
+	case kTrunc:
+	case kRound:
+		return executeSimpleNumericInstruction(thread, returnValue);
+	case kRect2Polar:
+		return executeRectToPolar(thread, returnValue);
+	case kPolar2Rect:
+		return executePolarToRect(thread, returnValue);
+	case kNum2Str:
+		return executeNum2Str(thread, returnValue);
+	case kStr2Num:
+		return executeStr2Num(thread, returnValue);
+	default:
+		thread->error("Unimplemented built-in function");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+}
+
+MiniscriptInstructionOutcome BuiltinFunc::executeSimpleNumericInstruction(MiniscriptThread *thread, DynamicValue *returnValue) const {
+	double result = 0.0;
+
+	double input = 0.0;
+	const DynamicValue &inputDynamicValue = thread->getStackValueFromTop(0).value;
+
+	switch (inputDynamicValue.getType()) {
+	case DynamicValueTypes::kInteger:
+		input = inputDynamicValue.getInt();
+		break;
+	case DynamicValueTypes::kFloat:
+		input = inputDynamicValue.getFloat();
+		break;
+	default:
+		thread->error("Invalid numeric function input type");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	switch (_funcID) {
+	case kSin:
+		result = sin(input * (M_PI / 180.0));
+		break;
+	case kCos:
+		result = cos(input * (M_PI / 180.0));
+		break;
+	case kRandom:
+		if (input < 1.5)
+			result = 0.0;
+		else {
+			uint rngMax = static_cast<uint>(floor(input + 0.5)) - 1;
+			result = thread->getRuntime()->getRandom()->getRandomNumber(rngMax);
+		}
+		break;
+	case kSqrt:
+		result = sqrt(input);
+		break;
+	case kTan:
+		result = tan(input * (M_PI / 180.0));
+		break;
+	case kAbs:
+		result = fabs(input);
+		break;
+	case kSign:
+		if (input < 0.0)
+			result = -1;
+		else if (input > 0.0)
+			result = 1;
+		else
+			result = 0;
+		break;
+	case kArctangent:
+		result = atan(input) * (180.0 / M_PI);
+		break;
+	case kExp:
+		result = exp(input);
+		break;
+	case kLn:
+		result = log(input);
+		break;
+	case kLog:
+		result = log10(input);
+		break;
+	case kCosH:
+		result = cosh(input * (M_PI / 180.0));
+		break;
+	case kSinH:
+		result = sinh(input * (M_PI / 180.0));
+		break;
+	case kTanH:
+		result = tanh(input * (M_PI / 180.0));
+		break;
+	case kTrunc:
+		result = trunc(input);
+		break;
+	case kRound:
+		result = round(input);
+		break;
+	default:
+		thread->error("Unimplemented numeric function");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	returnValue->setFloat(result);
+
+	return kMiniscriptInstructionOutcomeContinue;
+}
+
+MiniscriptInstructionOutcome BuiltinFunc::executeRectToPolar(MiniscriptThread *thread, DynamicValue *returnValue) const {
+	const DynamicValue &inputDynamicValue = thread->getStackValueFromTop(0).value;
+
+	if (inputDynamicValue.getType() != DynamicValueTypes::kPoint) {
+		thread->error("Polar to rect input must be a vector");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	const Point16 &pt = inputDynamicValue.getPoint();
+
+	double angle = atan2(pt.x, pt.y);
+	double magnitude = sqrt(pt.x * pt.x + pt.y * pt.y);
+
+	returnValue->setVector(AngleMagVector::create(angle, magnitude));
+
+	return kMiniscriptInstructionOutcomeContinue;
+}
+
+MiniscriptInstructionOutcome BuiltinFunc::executePolarToRect(MiniscriptThread *thread, DynamicValue *returnValue) const {
+	const DynamicValue &inputDynamicValue = thread->getStackValueFromTop(0).value;
+
+	if (inputDynamicValue.getType() != DynamicValueTypes::kVector) {
+		thread->error("Polar to rect input must be a vector");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	const AngleMagVector &vec = inputDynamicValue.getVector();
+
+	double x = cos(vec.angleRadians) * vec.magnitude;
+	double y = sin(vec.angleRadians) * vec.magnitude;
+
+	returnValue->setPoint(Point16::create(static_cast<int16>(round(x)), static_cast<int16>(round(y))));
+
+	return kMiniscriptInstructionOutcomeContinue;
+}
+
+MiniscriptInstructionOutcome BuiltinFunc::executeNum2Str(MiniscriptThread *thread, DynamicValue *returnValue) const {
+	Common::String result;
+
+	const DynamicValue &inputDynamicValue = thread->getStackValueFromTop(0).value;
+	switch (inputDynamicValue.getType()) {
+	case DynamicValueTypes::kInteger:
+		result.format("%i", static_cast<int>(inputDynamicValue.getInt()));
+		break;
+	case DynamicValueTypes::kFloat:
+		result.format("%g", static_cast<double>(inputDynamicValue.getFloat()));
+		break;
+	default:
+		thread->error("Invalid input value to num2str");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	return kMiniscriptInstructionOutcomeContinue;
+}
+
+MiniscriptInstructionOutcome BuiltinFunc::executeStr2Num(MiniscriptThread *thread, DynamicValue *returnValue) const {
+	double result = 0.0;
+
+	const DynamicValue &inputDynamicValue = thread->getStackValueFromTop(0).value;
+	if (inputDynamicValue.getType() != DynamicValueTypes::kString) {
+		thread->error("Invalid input value to str2num");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	const Common::String &str = inputDynamicValue.getString();
+	if (str.size() == 0 || !sscanf(str.c_str(), "%lf", &result)) {
+		thread->error("Couldn't parse number");
+		return kMiniscriptInstructionOutcomeFailed;
+	}
+
+	returnValue->setFloat(result);
+
+	return kMiniscriptInstructionOutcomeContinue;
+}
+
 MiniscriptInstructionOutcome StrConcat::execute(MiniscriptThread *thread) const {
 	if (thread->getStackSize() < 2) {
 		thread->error("Stack underflow");
diff --git a/engines/mtropolis/miniscript.h b/engines/mtropolis/miniscript.h
index ee87264bd22..462bc271177 100644
--- a/engines/mtropolis/miniscript.h
+++ b/engines/mtropolis/miniscript.h
@@ -246,6 +246,15 @@ namespace MiniscriptInstructions {
 		explicit BuiltinFunc(BuiltinFunctionID bfid);
 
 	private:
+		MiniscriptInstructionOutcome execute(MiniscriptThread *thread) const override;
+
+		MiniscriptInstructionOutcome executeFunction(MiniscriptThread *thread, DynamicValue *returnValue) const;
+		MiniscriptInstructionOutcome executeSimpleNumericInstruction(MiniscriptThread *thread, DynamicValue *returnValue) const;
+		MiniscriptInstructionOutcome executeRectToPolar(MiniscriptThread *thread, DynamicValue *returnValue) const;
+		MiniscriptInstructionOutcome executePolarToRect(MiniscriptThread *thread, DynamicValue *returnValue) const;
+		MiniscriptInstructionOutcome executeNum2Str(MiniscriptThread *thread, DynamicValue *returnValue) const;
+		MiniscriptInstructionOutcome executeStr2Num(MiniscriptThread *thread, DynamicValue *returnValue) const;
+
 		BuiltinFunctionID _funcID;
 	};
 
diff --git a/engines/mtropolis/plugin/standard_data.cpp b/engines/mtropolis/plugin/standard_data.cpp
index a70509800fc..c2b9c8ef2df 100644
--- a/engines/mtropolis/plugin/standard_data.cpp
+++ b/engines/mtropolis/plugin/standard_data.cpp
@@ -43,10 +43,9 @@ DataReadErrorCode STransCtModifier::load(PlugIn &plugIn, const PlugInModifier &p
 	if (prefix.plugInRevision != 0)
 		return kDataReadErrorUnsupportedRevision;
 
-	if (!reader.readU16(unknown1) || !unknown2.load(reader) || !reader.readU16(unknown3) || !unknown4.load(reader)
-		|| !reader.readU16(unknown5) || !reader.readU32(unknown6) || !reader.readU16(unknown7) || !reader.readU32(unknown8)
-		|| !reader.readU16(unknown9) || !reader.readU32(unknown10) || !reader.readU16(unknown11) || !reader.readU32(unknown12)
-		|| !reader.readU16(unknown13) || !reader.readU32(unknown14) || !reader.readU16(unknown15) || !reader.readBytes(unknown16))
+	if (!enableWhen.load(reader) || !disableWhen.load(reader) || !transitionType.load(reader) ||
+		!transitionDirection.load(reader) || !unknown1.load(reader) || !steps.load(reader) ||
+		!duration.load(reader) || !fullScreen.load(reader))
 		return kDataReadErrorReadFailed;
 
 	return kDataReadErrorNone;
diff --git a/engines/mtropolis/plugin/standard_data.h b/engines/mtropolis/plugin/standard_data.h
index 9863f492d86..00a76be3a2b 100644
--- a/engines/mtropolis/plugin/standard_data.h
+++ b/engines/mtropolis/plugin/standard_data.h
@@ -44,22 +44,14 @@ protected:
 };
 
 struct STransCtModifier : public PlugInModifierData {
-	uint16 unknown1;	// Type tag? (0x17)
-	Event unknown2;		// Probably "apply when"
-	uint16 unknown3;	// Type tag? (0x17)
-	Event unknown4;		// Probably "remove when"
-	uint16 unknown5;	// Type tag? (1)
-	uint32 unknown6;
-	uint16 unknown7;	// Type tag? (1)
-	uint32 unknown8;
-	uint16 unknown9;	// Type tag? (1)
-	uint32 unknown10;
-	uint16 unknown11;	// Type tag? (1)
-	uint32 unknown12;
-	uint16 unknown13;	// Type tag? (1)
-	uint32 unknown14;
-	uint16 unknown15;	// Type tag? (0x14)
-	uint8 unknown16[2];
+	PlugInTypeTaggedValue enableWhen;  // Event
+	PlugInTypeTaggedValue disableWhen;	// Event
+	PlugInTypeTaggedValue transitionType;	// int
+	PlugInTypeTaggedValue transitionDirection;	// int
+	PlugInTypeTaggedValue unknown1; // int, seems to always be 1
+	PlugInTypeTaggedValue steps;	// int, seems to always be 32
+	PlugInTypeTaggedValue duration;    // int, always observed as 60000
+	PlugInTypeTaggedValue fullScreen; // bool
 
 protected:
 	DataReadErrorCode load(PlugIn &plugIn, const PlugInModifier &prefix, DataReader &reader) override;
diff --git a/engines/mtropolis/runtime.cpp b/engines/mtropolis/runtime.cpp
index 81c00fed80e..b49847d0bed 100644
--- a/engines/mtropolis/runtime.cpp
+++ b/engines/mtropolis/runtime.cpp
@@ -30,6 +30,7 @@
 
 #include "common/debug.h"
 #include "common/file.h"
+#include "common/random.h"
 #include "common/substream.h"
 #include "common/system.h"
 
@@ -2483,6 +2484,8 @@ Runtime::SceneStackEntry::SceneStackEntry() {
 Runtime::Runtime(OSystem *system) : _nextRuntimeGUID(1), _realDisplayMode(kColorDepthModeInvalid), _fakeDisplayMode(kColorDepthModeInvalid),
 									_displayWidth(1024), _displayHeight(768), _realTimeBase(0), _playTimeBase(0), _sceneTransitionState(kSceneTransitionStateNotTransitioning),
 									_system(system), _lastFrameCursor(nullptr), _defaultCursor(new DefaultCursor()) {
+	_random.reset(new Common::RandomSource("mtropolis"));
+
 	_vthread.reset(new VThread());
 
 	for (int i = 0; i < kColorDepthModeCount; i++) {
@@ -3187,7 +3190,9 @@ void Runtime::onMouseUp(int32 x, int32 y, Actions::MouseButton mButton) {
 		_mouseFocusWindow.reset();
 }
 
-
+Common::RandomSource* Runtime::getRandom() const {
+	return _random.get();
+}
 
 void Runtime::ensureMainWindowExists() {
 	// Maybe there's a better spot for this
@@ -4319,10 +4324,12 @@ bool VisualElement::readAttribute(MiniscriptThread *thread, DynamicValue &result
 	if (attrib == "visible") {
 		result.setBool(_visible);
 		return true;
-	}
-	if (attrib == "direct") {
+	} else if (attrib == "direct") {
 		result.setBool(_directToScreen);
 		return true;
+	} else if (attrib == "position") {
+		result.setPoint(Point16::create(_rect.left, _rect.top));
+		return true;
 	}
 
 	return Element::readAttribute(thread, result, attrib);
@@ -4332,10 +4339,12 @@ bool VisualElement::writeRefAttribute(MiniscriptThread *thread, DynamicValueWrit
 	if (attrib == "visible") {
 		DynamicValueWriteFuncHelper<VisualElement, &VisualElement::scriptSetVisibility>::create(this, writeProxy);
 		return true;
-	}
-	if (attrib == "direct") {
+	} else if (attrib == "direct") {
 		DynamicValueWriteFuncHelper<VisualElement, &VisualElement::scriptSetDirect>::create(this, writeProxy);
 		return true;
+	} else if (attrib == "position") {
+		DynamicValueWriteFuncHelper<VisualElement, &VisualElement::scriptSetPosition>::create(this, writeProxy);
+		return true;
 	}
 
 	return Element::writeRefAttribute(thread, writeProxy, attrib);
@@ -4374,6 +4383,34 @@ bool VisualElement::scriptSetDirect(const DynamicValue &dest) {
 	return false;
 }
 
+bool VisualElement::scriptSetPosition(const DynamicValue &dest) {
+	if (dest.getType() == DynamicValueTypes::kPoint) {
+		const Point16 &destPoint = dest.getPoint();
+		int32 xDelta = destPoint.x - _rect.left;
+		int32 yDelta = destPoint.y - _rect.right;
+
+		offsetTranslate(xDelta, yDelta);
+
+		return true;
+	}
+	return false;
+}
+
+void VisualElement::offsetTranslate(int32 xDelta, int32 yDelta) {
+	_rect.left += xDelta;
+	_rect.right += xDelta;
+	_rect.top += yDelta;
+	_rect.bottom += yDelta;
+
+	for (const Common::SharedPtr<Structural> &child : _children) {
+		if (child->isElement()) {
+			Element *element = static_cast<Element *>(child.get());
+			if (element->isVisual())
+				static_cast<VisualElement *>(element)->offsetTranslate(xDelta, yDelta);
+		}
+	}
+}
+
 VThreadState VisualElement::changeVisibilityTask(const ChangeFlagTaskData &taskData) {
 	if (_visible != taskData.desiredFlag) {
 		_visible = taskData.desiredFlag;
diff --git a/engines/mtropolis/runtime.h b/engines/mtropolis/runtime.h
index 51ccf30e9a7..22015f92336 100644
--- a/engines/mtropolis/runtime.h
+++ b/engines/mtropolis/runtime.h
@@ -39,6 +39,12 @@
 
 class OSystem;
 
+namespace Common {
+
+class RandomSource;
+
+} // End of namespace Common
+
 namespace Graphics {
 
 struct WinCursorGroup;
@@ -398,6 +404,13 @@ struct AngleMagVector {
 		return !((*this) == other);
 	}
 
+	inline static AngleMagVector create(double angleRadians, double magnitude) {
+		AngleMagVector result;
+		result.angleRadians = angleRadians;
+		result.magnitude = magnitude;
+		return result;
+	}
+
 	bool dynSetAngleDegrees(const DynamicValue &value);
 	void dynGetAngleDegrees(DynamicValue &value) const;
 
@@ -1267,6 +1280,8 @@ public:
 	void onMouseMove(int32 x, int32 y);
 	void onMouseUp(int32 x, int32 y, Actions::MouseButton mButton);
 
+	Common::RandomSource *getRandom() const;
+
 #ifdef MTROPOLIS_DEBUG_ENABLE
 	void debugSetEnabled(bool enabled);
 	void debugBreak();
@@ -1360,6 +1375,8 @@ private:
 
 	Common::SharedPtr<Graphics::MacFontManager> _macFontMan;
 
+	Common::SharedPtr<Common::RandomSource> _random;
+
 	uint32 _nextRuntimeGUID;
 
 	bool _displayModeSupported[kColorDepthModeCount];
@@ -1823,6 +1840,9 @@ protected:
 	bool loadCommon(const Common::String &name, uint32 guid, const Data::Rect &rect, uint32 elementFlags, uint16 layer, uint32 streamLocator, uint16 sectionID);
 
 	bool scriptSetDirect(const DynamicValue &dest);
+	bool scriptSetPosition(const DynamicValue &dest);
+
+	void offsetTranslate(int32 xDelta, int32 yDelta);
 
 	struct ChangeFlagTaskData {
 		bool desiredFlag;