diff --git a/src/ai/default/default.cpp b/src/ai/default/default.cpp
index a5bc105146..d0b5e7fba4 100644
--- a/src/ai/default/default.cpp
+++ b/src/ai/default/default.cpp
@@ -132,7 +132,7 @@ static void AiStateVehLoop(Player *p)
 	p->ai.state_counter = 0;
 }
 
-static EngineID AiChooseTrainToBuild(RailType railtype, int32 money, byte flag, TileIndex tile)
+static EngineID AiChooseTrainToBuild(RailType railtype, Money money, byte flag, TileIndex tile)
 {
 	EngineID best_veh_index = INVALID_ENGINE;
 	byte best_veh_score = 0;
@@ -161,7 +161,7 @@ static EngineID AiChooseTrainToBuild(RailType railtype, int32 money, byte flag,
 	return best_veh_index;
 }
 
-static EngineID AiChooseRoadVehToBuild(CargoID cargo, int32 money, TileIndex tile)
+static EngineID AiChooseRoadVehToBuild(CargoID cargo, Money money, TileIndex tile)
 {
 	EngineID best_veh_index = INVALID_ENGINE;
 	int32 best_veh_rating = 0;
@@ -199,10 +199,10 @@ static EngineID AiChooseRoadVehToBuild(CargoID cargo, int32 money, TileIndex til
 	return best_veh_index;
 }
 
-static EngineID AiChooseAircraftToBuild(int32 money, byte flag)
+static EngineID AiChooseAircraftToBuild(Money money, byte flag)
 {
 	EngineID best_veh_index = INVALID_ENGINE;
-	int32 best_veh_cost = 0;
+	Money best_veh_cost = 0;
 	EngineID i;
 
 	for (i = AIRCRAFT_ENGINES_INDEX; i != AIRCRAFT_ENGINES_INDEX + NUM_AIRCRAFT_ENGINES; i++) {
@@ -225,9 +225,9 @@ static EngineID AiChooseAircraftToBuild(int32 money, byte flag)
 	return best_veh_index;
 }
 
-static int32 AiGetBasePrice(const Player* p)
+static Money AiGetBasePrice(const Player* p)
 {
-	int32 base = _price.station_value;
+	Money base = _price.station_value;
 
 	// adjust base price when more expensive vehicles are available
 	switch (p->ai.railtype_to_use) {
@@ -242,7 +242,7 @@ static int32 AiGetBasePrice(const Player* p)
 }
 
 #if 0
-static EngineID AiChooseShipToBuild(byte cargo, int32 money)
+static EngineID AiChooseShipToBuild(byte cargo, Money money)
 {
 	// XXX: not done
 	return INVALID_ENGINE;
@@ -251,13 +251,13 @@ static EngineID AiChooseShipToBuild(byte cargo, int32 money)
 
 static EngineID AiChooseRoadVehToReplaceWith(const Player* p, const Vehicle* v)
 {
-	int32 avail_money = p->player_money + v->value;
+	Money avail_money = p->player_money + v->value;
 	return AiChooseRoadVehToBuild(v->cargo_type, avail_money, v->tile);
 }
 
 static EngineID AiChooseAircraftToReplaceWith(const Player* p, const Vehicle* v)
 {
-	int32 avail_money = p->player_money + v->value;
+	Money avail_money = p->player_money + v->value;
 	return AiChooseAircraftToBuild(
 		avail_money, AircraftVehInfo(v->engine_type)->subtype & AIR_CTOL
 	);
@@ -265,7 +265,7 @@ static EngineID AiChooseAircraftToReplaceWith(const Player* p, const Vehicle* v)
 
 static EngineID AiChooseTrainToReplaceWith(const Player* p, const Vehicle* v)
 {
-	int32 avail_money = p->player_money + v->value;
+	Money avail_money = p->player_money + v->value;
 	const Vehicle* u = v;
 	int num = 0;
 
@@ -3901,7 +3901,7 @@ static void AiHandleTakeover(Player *p)
 
 static void AiAdjustLoan(const Player* p)
 {
-	int32 base = AiGetBasePrice(p);
+	Money base = AiGetBasePrice(p);
 
 	if (p->player_money > base * 1400) {
 		// Decrease loan
diff --git a/src/ai/trolly/trolly.cpp b/src/ai/trolly/trolly.cpp
index fb0263d41c..1f540ceed1 100644
--- a/src/ai/trolly/trolly.cpp
+++ b/src/ai/trolly/trolly.cpp
@@ -97,7 +97,6 @@ static void AiNew_State_Nothing(Player *p)
 //    - Build HQ
 static void AiNew_State_WakeUp(Player *p)
 {
-	int32 money;
 	int c;
 	assert(p->ainew.state == AI_STATE_WAKE_UP);
 	// First, check if we have a HQ
@@ -111,7 +110,7 @@ static void AiNew_State_WakeUp(Player *p)
 		return;
 	}
 
-	money = p->player_money - AI_MINIMUM_MONEY;
+	Money money = p->player_money - AI_MINIMUM_MONEY;
 
 	// Let's pick an action!
 	if (p->ainew.action == AI_ACTION_NONE) {
diff --git a/src/aircraft_cmd.cpp b/src/aircraft_cmd.cpp
index b92039ed5d..2f4f90daaf 100644
--- a/src/aircraft_cmd.cpp
+++ b/src/aircraft_cmd.cpp
@@ -347,7 +347,7 @@ CommandCost CmdBuildAircraft(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 
 		v->subtype = (avi->subtype & AIR_CTOL ? AIR_AIRCRAFT : AIR_HELICOPTER);
 		v->UpdateDeltaXY(INVALID_DIR);
-		v->value = (uint32)value.GetCost();
+		v->value = value.GetCost();
 
 		u->subtype = AIR_SHADOW;
 		u->UpdateDeltaXY(INVALID_DIR);
diff --git a/src/autoreplace_cmd.cpp b/src/autoreplace_cmd.cpp
index 37e0f79d89..14c5e3310b 100644
--- a/src/autoreplace_cmd.cpp
+++ b/src/autoreplace_cmd.cpp
@@ -124,7 +124,7 @@ static CargoID GetNewCargoTypeForReplace(Vehicle *v, EngineID engine_type)
  * @param flags is the flags to use when calling DoCommand(). Mainly DC_EXEC counts
  * @return value is cost of the replacement or CMD_ERROR
  */
-static CommandCost ReplaceVehicle(Vehicle **w, byte flags, int32 total_cost)
+static CommandCost ReplaceVehicle(Vehicle **w, byte flags, Money total_cost)
 {
 	CommandCost cost;
 	CommandCost sell_value;
diff --git a/src/bridge_gui.cpp b/src/bridge_gui.cpp
index da0cd4a888..238ac16985 100644
--- a/src/bridge_gui.cpp
+++ b/src/bridge_gui.cpp
@@ -22,7 +22,7 @@ static struct BridgeData {
 	TileIndex end_tile;
 	byte type;
 	byte indexes[MAX_BRIDGES];
-	int32 costs[MAX_BRIDGES];
+	Money costs[MAX_BRIDGES];
 } _bridgedata;
 
 void CcBuildBridge(bool success, TileIndex tile, uint32 p1, uint32 p2)
diff --git a/src/build_vehicle_gui.cpp b/src/build_vehicle_gui.cpp
index 517ad7b52b..94647881da 100644
--- a/src/build_vehicle_gui.cpp
+++ b/src/build_vehicle_gui.cpp
@@ -206,9 +206,9 @@ static int CDECL TrainEngineRunningCostSorter(const void *a, const void *b)
 	const RailVehicleInfo *rvi_a = RailVehInfo(*(const EngineID*)a);
 	const RailVehicleInfo *rvi_b = RailVehInfo(*(const EngineID*)b);
 
-	int va = rvi_a->running_cost_base * _price.running_rail[rvi_a->running_cost_class] * (rvi_a->railveh_type == RAILVEH_MULTIHEAD ? 2 : 1);
-	int vb = rvi_b->running_cost_base * _price.running_rail[rvi_b->running_cost_class] * (rvi_b->railveh_type == RAILVEH_MULTIHEAD ? 2 : 1);
-	int r = va - vb;
+	Money va = rvi_a->running_cost_base * _price.running_rail[rvi_a->running_cost_class] * (rvi_a->railveh_type == RAILVEH_MULTIHEAD ? 2 : 1);
+	Money vb = rvi_b->running_cost_base * _price.running_rail[rvi_b->running_cost_class] * (rvi_b->railveh_type == RAILVEH_MULTIHEAD ? 2 : 1);
+	int r = ClampToI32(va - vb);
 
 	return _internal_sort_order ? -r : r;
 }
@@ -224,9 +224,9 @@ static int CDECL TrainEnginePowerVsRunningCostSorter(const void *a, const void *
 		* Because of this, the return value have to be reversed as well and we return b - a instead of a - b.
 		* Another thing is that both power and running costs should be doubled for multiheaded engines.
 		* Since it would be multipling with 2 in both numerator and denumerator, it will even themselves out and we skip checking for multiheaded. */
-	int va = (rvi_a->running_cost_base * _price.running_rail[rvi_a->running_cost_class]) / max((uint16)1, rvi_a->power);
-	int vb = (rvi_b->running_cost_base * _price.running_rail[rvi_b->running_cost_class]) / max((uint16)1, rvi_b->power);
-	int r = vb - va;
+	Money va = (rvi_a->running_cost_base * _price.running_rail[rvi_a->running_cost_class]) / max((uint16)1, rvi_a->power);
+	Money vb = (rvi_b->running_cost_base * _price.running_rail[rvi_b->running_cost_class]) / max((uint16)1, rvi_b->power);
+	int r = ClampToI32(vb - va);
 
 	return _internal_sort_order ? -r : r;
 }
diff --git a/src/command.cpp b/src/command.cpp
index a400307dcb..3aa93777c5 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -418,10 +418,10 @@ error:
 	return res;
 }
 
-int32 GetAvailableMoneyForCommand()
+Money GetAvailableMoneyForCommand()
 {
 	PlayerID pid = _current_player;
-	if (!IsValidPlayer(pid)) return 0x7FFFFFFF; // max int
+	if (!IsValidPlayer(pid)) return INT64_MAX;
 	return GetPlayer(pid)->player_money;
 }
 
@@ -568,7 +568,7 @@ bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, CommandCallback *callback,
 
 	if (IsLocalPlayer() && _game_mode != GM_EDITOR) {
 		if (res2.GetCost() != 0) ShowCostOrIncomeAnimation(x, y, GetSlopeZ(x, y), res2.GetCost());
-		if (_additional_cash_required) {
+		if (_additional_cash_required != 0) {
 			SetDParam(0, _additional_cash_required);
 			ShowErrorMessage(STR_0003_NOT_ENOUGH_CASH_REQUIRES, error_part1, x, y);
 			if (res2.GetCost() == 0) goto callb_err;
diff --git a/src/command.h b/src/command.h
index 6f20147650..c19027a310 100644
--- a/src/command.h
+++ b/src/command.h
@@ -212,6 +212,6 @@ extern const char* _cmd_text; ///< Text, which gets sent with a command
 
 bool IsValidCommand(uint cmd);
 byte GetCommandFlags(uint cmd);
-int32 GetAvailableMoneyForCommand();
+Money GetAvailableMoneyForCommand();
 
 #endif /* COMMAND_H */
diff --git a/src/economy.cpp b/src/economy.cpp
index fde538feb5..b9813a7ea0 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -112,7 +112,7 @@ int UpdateCompanyRatingAndValue(Player *p, bool update)
 /* Count vehicles */
 	{
 		Vehicle *v;
-		int32 min_profit = 0;
+		Money min_profit = 0;
 		bool min_profit_first = true;
 		uint num = 0;
 
@@ -135,7 +135,7 @@ int UpdateCompanyRatingAndValue(Player *p, bool update)
 		_score_part[owner][SCORE_VEHICLES] = num;
 		/* Don't allow negative min_profit to show */
 		if (min_profit > 0)
-			_score_part[owner][SCORE_MIN_PROFIT] = min_profit;
+			_score_part[owner][SCORE_MIN_PROFIT] = ClampToI32(min_profit);
 	}
 
 /* Count stations */
@@ -163,9 +163,9 @@ int UpdateCompanyRatingAndValue(Player *p, bool update)
 			} while (++pee,--numec);
 
 			if (min_income > 0)
-				_score_part[owner][SCORE_MIN_INCOME] = min_income;
+				_score_part[owner][SCORE_MIN_INCOME] = ClampToI32(min_income);
 
-			_score_part[owner][SCORE_MAX_INCOME] = max_income;
+			_score_part[owner][SCORE_MAX_INCOME] = ClampToI32(max_income);
 		}
 	}
 
@@ -196,15 +196,14 @@ int UpdateCompanyRatingAndValue(Player *p, bool update)
 
 /* Generate score for player money */
 	{
-		int32 money = p->player_money;
-		if (money > 0) {
-			_score_part[owner][SCORE_MONEY] = money;
+		if (p->player_money > 0) {
+			_score_part[owner][SCORE_MONEY] = ClampToI32(p->player_money);
 		}
 	}
 
 /* Generate score for loan */
 	{
-		_score_part[owner][SCORE_LOAN] = _score_info[SCORE_LOAN].needed - p->current_loan;
+		_score_part[owner][SCORE_LOAN] = ClampToI32(_score_info[SCORE_LOAN].needed - p->current_loan);
 	}
 
 	/* Now we calculate the score for each item.. */
@@ -438,7 +437,6 @@ static void ChangeNetworkOwner(PlayerID current_player, PlayerID new_player)
 static void PlayersCheckBankrupt(Player *p)
 {
 	PlayerID owner;
-	int64 val;
 
 	/*  If the player has money again, it does not go bankrupt */
 	if (p->player_money >= 0) {
@@ -466,7 +464,7 @@ static void PlayersCheckBankrupt(Player *p)
 
 			/* Check if the company has any value.. if not, declare it bankrupt
 			 *  right now */
-			val = CalculateCompanyValue(p);
+			Money val = CalculateCompanyValue(p);
 			if (val > 0) {
 				p->bankrupt_value = val;
 				p->bankrupt_asked = 1 << owner; // Don't ask the owner
@@ -1319,11 +1317,11 @@ static bool CheckSubsidised(Station *from, Station *to, CargoID cargo_type)
 	return false;
 }
 
-static int32 DeliverGoods(int num_pieces, CargoID cargo_type, StationID source, StationID dest, TileIndex source_tile, byte days_in_transit)
+static Money DeliverGoods(int num_pieces, CargoID cargo_type, StationID source, StationID dest, TileIndex source_tile, byte days_in_transit)
 {
 	bool subsidised;
 	Station *s_from, *s_to;
-	int32 profit;
+	Money profit;
 
 	assert(num_pieces > 0);
 
@@ -1511,7 +1509,7 @@ static void LoadUnloadVehicle(Vehicle *v, int *cargo_left)
 	bool anything_loaded   = false;
 	uint32 cargo_not_full  = 0;
 	uint32 cargo_full      = 0;
-	int total_cargo_feeder_share = 0; // the feeder cash amount for the goods being loaded/unloaded in this load step
+	Money total_cargo_feeder_share = 0; // the feeder cash amount for the goods being loaded/unloaded in this load step
 
 	v->cur_speed = 0;
 
@@ -1603,7 +1601,7 @@ static void LoadUnloadVehicle(Vehicle *v, int *cargo_left)
 		/* if last speed is 0, we treat that as if no vehicle has ever visited the station. */
 		ge->days_since_pickup = 0;
 		ge->last_speed = min(t, 255);
-		ge->last_age = _cur_year - v->build_year;
+		ge->last_age = _cur_year - u->build_year;
 
 		/* If there's goods waiting at the station, and the vehicle
 		 * has capacity for it, load it on the vehicle. */
@@ -1643,7 +1641,7 @@ static void LoadUnloadVehicle(Vehicle *v, int *cargo_left)
 			 * ge->unload_pending holds the amount that has been credited, but has not yet been unloaded.
 			 */
 			int cargoshare = cap * 10000 / (ge->waiting_acceptance + ge->unload_pending);
-			int feeder_profit_share = ge->feeder_profit * cargoshare / 10000;
+			Money feeder_profit_share = ge->feeder_profit * cargoshare / 10000;
 			v->cargo_count += cap;
 			ge->waiting_acceptance -= cap;
 
diff --git a/src/fileio.cpp b/src/fileio.cpp
index b7c060fed3..2b37dabf22 100644
--- a/src/fileio.cpp
+++ b/src/fileio.cpp
@@ -410,7 +410,9 @@ void ChangeWorkingDirectory(const char *exe)
 void DetermineBasePaths(const char *exe)
 {
 	char tmp[MAX_PATH];
-#ifdef WITH_PERSONAL_DIR
+#if defined(__MORPHOS__) || defined(__AMIGA__) || !defined(WITH_PERSONAL_DIR)
+	_searchpaths[SP_PERSONAL_DIR] = NULL;
+#else
 	const char *homedir = getenv("HOME");
 
 	if (homedir == NULL) {
@@ -422,14 +424,16 @@ void DetermineBasePaths(const char *exe)
 	AppendPathSeparator(tmp, MAX_PATH);
 
 	_searchpaths[SP_PERSONAL_DIR] = strdup(tmp);
-#else
-	_searchpaths[SP_PERSONAL_DIR] = NULL;
 #endif
 	_searchpaths[SP_SHARED_DIR] = NULL;
 
+#if defined(__MORPHOS__) || defined(__AMIGA__)
+	_searchpaths[SP_WORKING_DIR] = NULL;
+#else
 	getcwd(tmp, MAX_PATH);
 	AppendPathSeparator(tmp, MAX_PATH);
 	_searchpaths[SP_WORKING_DIR] = strdup(tmp);
+#endif
 
 	/* Change the working directory to that one of the executable */
 	ChangeWorkingDirectory((char*)exe);
@@ -437,9 +441,13 @@ void DetermineBasePaths(const char *exe)
 	AppendPathSeparator(tmp, MAX_PATH);
 	_searchpaths[SP_BINARY_DIR] = strdup(tmp);
 
+#if defined(__MORPHOS__) || defined(__AMIGA__)
+	_searchpaths[SP_INSTALLATION_DIR] = NULL;
+#else
 	snprintf(tmp, MAX_PATH, "%s", GLOBAL_DATA_DIR);
 	AppendPathSeparator(tmp, MAX_PATH);
 	_searchpaths[SP_INSTALLATION_DIR] = strdup(tmp);
+#endif
 #ifdef WITH_COCOA
 extern void cocoaSetApplicationBundleDir();
 	cocoaSetApplicationBundleDir();
diff --git a/src/functions.h b/src/functions.h
index 9edddce4bf..ba6d737e38 100644
--- a/src/functions.h
+++ b/src/functions.h
@@ -139,8 +139,8 @@ void DrawSprite(SpriteID img, SpriteID pal, int x, int y);
 bool EnsureNoVehicle(TileIndex tile);
 bool EnsureNoVehicleOnGround(TileIndex tile);
 void MarkAllViewportsDirty(int left, int top, int right, int bottom);
-void ShowCostOrIncomeAnimation(int x, int y, int z, int32 cost);
-void ShowFeederIncomeAnimation(int x, int y, int z, int32 cost);
+void ShowCostOrIncomeAnimation(int x, int y, int z, Money cost);
+void ShowFeederIncomeAnimation(int x, int y, int z, Money cost);
 
 bool CheckIfAuthorityAllows(TileIndex tile);
 Town *ClosestTownFromTile(TileIndex tile, uint threshold);
diff --git a/src/gui.h b/src/gui.h
index f985826c62..cfe9fa5b99 100644
--- a/src/gui.h
+++ b/src/gui.h
@@ -105,7 +105,7 @@ void ShowPlayerStations(PlayerID player);
 void ShowPlayerFinances(PlayerID player);
 void ShowPlayerCompany(PlayerID player);
 
-void ShowEstimatedCostOrIncome(int32 cost, int x, int y);
+void ShowEstimatedCostOrIncome(Money cost, int x, int y);
 void ShowErrorMessage(StringID msg_1, StringID msg_2, int x, int y);
 
 void DrawStationCoverageAreaText(int sx, int sy, uint mask,int rad);
diff --git a/src/macros.h b/src/macros.h
index c10ef4d49c..406ae83dab 100644
--- a/src/macros.h
+++ b/src/macros.h
@@ -51,6 +51,14 @@ static inline uint clampu(uint a, uint min, uint max)
 	return a;
 }
 
+/* Gracefully reduce a signed 64-bit int to signed 32-bit -- no bogusly truncating the sign bit */
+static inline int32 ClampToI32(int64 a)
+{
+	if (a <= (int32)0x80000000) return 0x80000000;
+	if (a >= (int32)0x7FFFFFFF) return 0x7FFFFFFF;
+	return (int32)a;
+}
+
 static inline int32 BIGMULSS(int32 a, int32 b, int shift)
 {
 	return (int32)((int64)a * (int64)b >> shift);
diff --git a/src/main_gui.cpp b/src/main_gui.cpp
index 430d9948f1..a7896b62d6 100644
--- a/src/main_gui.cpp
+++ b/src/main_gui.cpp
@@ -94,10 +94,10 @@ void HandleOnEditText(const char *str)
 		const Player *p = GetPlayer(_current_player);
 		Money money = min(p->player_money - p->current_loan, atoi(str) / _currency->rate);
 
-		money = clamp(money, 0, 20000000); // Clamp between 20 million and 0
+		uint32 money_c = clamp(ClampToI32(money), 0, 20000000); // Clamp between 20 million and 0
 
 		/* Give 'id' the money, and substract it from ourself */
-		DoCommandP(0, money, id, CcGiveMoney, CMD_GIVE_MONEY | CMD_MSG(STR_INSUFFICIENT_FUNDS));
+		DoCommandP(0, money_c, id, CcGiveMoney, CMD_GIVE_MONEY | CMD_MSG(STR_INSUFFICIENT_FUNDS));
 	} break;
 #endif /* ENABLE_NETWORK */
 		default: NOT_REACHED();
diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
index 5ab3782977..64fba654c7 100644
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -104,7 +104,7 @@ static void Place_LandInfo(TileIndex tile)
 	t = ClosestTownFromTile(tile, _patches.dist_local_authority);
 
 	old_money = p->player_money;
-	p->player_money = 0x7fffffff;
+	p->player_money = INT64_MAX;
 	costclear = DoCommand(tile, 0, 0, 0, CMD_LANDSCAPE_CLEAR);
 	p->player_money = old_money;
 
@@ -610,7 +610,7 @@ void ShowErrorMessage(StringID msg_1, StringID msg_2, int x, int y)
 }
 
 
-void ShowEstimatedCostOrIncome(int32 cost, int x, int y)
+void ShowEstimatedCostOrIncome(Money cost, int x, int y)
 {
 	StringID msg = STR_0805_ESTIMATED_COST;
 
@@ -622,7 +622,7 @@ void ShowEstimatedCostOrIncome(int32 cost, int x, int y)
 	ShowErrorMessage(INVALID_STRING_ID, msg, x, y);
 }
 
-void ShowCostOrIncomeAnimation(int x, int y, int z, int32 cost)
+void ShowCostOrIncomeAnimation(int x, int y, int z, Money cost)
 {
 	StringID msg;
 	Point pt = RemapCoords(x,y,z);
@@ -636,7 +636,7 @@ void ShowCostOrIncomeAnimation(int x, int y, int z, int32 cost)
 	AddTextEffect(msg, pt.x, pt.y, 0x250);
 }
 
-void ShowFeederIncomeAnimation(int x, int y, int z, int32 cost)
+void ShowFeederIncomeAnimation(int x, int y, int z, Money cost)
 {
 	Point pt = RemapCoords(x,y,z);
 
diff --git a/src/network/network.h b/src/network/network.h
index 6cd534ec9a..c20e9b3f85 100644
--- a/src/network/network.h
+++ b/src/network/network.h
@@ -44,9 +44,9 @@ struct NetworkPlayerInfo {
 	char company_name[NETWORK_NAME_LENGTH];         // Company name
 	char password[NETWORK_PASSWORD_LENGTH];         // The password for the player
 	Year inaugurated_year;                          // What year the company started in
-	int64 company_value;                            // The company value
-	int64 money;                                    // The amount of money the company has
-	int64 income;                                   // How much did the company earned last year
+	Money company_value;                            // The company value
+	Money money;                                    // The amount of money the company has
+	Money income;                                   // How much did the company earned last year
 	uint16 performance;                             // What was his performance last month?
 	bool use_password;                              // Is there a password
 	uint16 num_vehicle[NETWORK_VEHICLE_TYPES];      // How many vehicles are there of this type?
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index 7a3e980eb4..fc2dacdcf0 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -727,19 +727,19 @@ static uint32 VehicleGetVariable(const ResolverObject *object, byte variable, by
 		case 0x4F: return GB(v->reliability, 8, 8);
 		case 0x50: return v->reliability_spd_dec;
 		case 0x51: return GB(v->reliability_spd_dec, 8, 8);
-		case 0x52: return v->profit_this_year;
-		case 0x53: return GB(v->profit_this_year,  8, 24);
-		case 0x54: return GB(v->profit_this_year, 16, 16);
-		case 0x55: return GB(v->profit_this_year, 24,  8);
-		case 0x56: return v->profit_last_year;
-		case 0x57: return GB(v->profit_last_year,  8, 24);
-		case 0x58: return GB(v->profit_last_year, 16, 16);
-		case 0x59: return GB(v->profit_last_year, 24,  8);
+		case 0x52: return ClampToI32(v->profit_this_year);
+		case 0x53: return GB(ClampToI32(v->profit_this_year),  8, 24);
+		case 0x54: return GB(ClampToI32(v->profit_this_year), 16, 16);
+		case 0x55: return GB(ClampToI32(v->profit_this_year), 24,  8);
+		case 0x56: return ClampToI32(v->profit_last_year);
+		case 0x57: return GB(ClampToI32(v->profit_last_year),  8, 24);
+		case 0x58: return GB(ClampToI32(v->profit_last_year), 16, 16);
+		case 0x59: return GB(ClampToI32(v->profit_last_year), 24,  8);
 		case 0x5A: return v->next == NULL ? INVALID_VEHICLE : v->next->index;
-		case 0x5C: return v->value;
-		case 0x5D: return GB(v->value,  8, 24);
-		case 0x5E: return GB(v->value, 16, 16);
-		case 0x5F: return GB(v->value, 24,  8);
+		case 0x5C: return ClampToI32(v->value);
+		case 0x5D: return GB(ClampToI32(v->value),  8, 24);
+		case 0x5E: return GB(ClampToI32(v->value), 16, 16);
+		case 0x5F: return GB(ClampToI32(v->value), 24,  8);
 		case 0x60: return v->string_id;
 		case 0x61: return GB(v->string_id, 8, 8);
 		case 0x72: return v->cargo_subtype;
diff --git a/src/player.h b/src/player.h
index 5c08256625..45a7a45185 100644
--- a/src/player.h
+++ b/src/player.h
@@ -116,7 +116,7 @@ struct PlayerAiNew {
 
 	CargoID cargo;
 	byte tbt;    ///< train/bus/truck 0/1/2 AI_TRAIN/AI_BUS/AI_TRUCK
-	int new_cost;
+	Money new_cost;
 
 	byte action;
 
diff --git a/src/player_gui.cpp b/src/player_gui.cpp
index 2f307570d5..a56d05c780 100644
--- a/src/player_gui.cpp
+++ b/src/player_gui.cpp
@@ -31,8 +31,8 @@ static void DoShowPlayerFinances(PlayerID player, bool show_small, bool show_sti
 static void DrawPlayerEconomyStats(const Player *p, byte mode)
 {
 	int x, y, i, j, year;
-	const int64 (*tbl)[13];
-	int64 sum, cost;
+	const Money (*tbl)[13];
+	Money sum, cost;
 	StringID str;
 
 	if (!(mode & 1)) { // normal sized economics window (mode&1) is minimized status
diff --git a/src/rail_cmd.cpp b/src/rail_cmd.cpp
index 9c9dc791af..6dc6d36a6e 100644
--- a/src/rail_cmd.cpp
+++ b/src/rail_cmd.cpp
@@ -974,7 +974,7 @@ extern CommandCost DoConvertTunnelBridgeRail(TileIndex tile, RailType totype, bo
 CommandCost CmdConvertRail(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 {
 	CommandCost ret, cost;
-	int32 money;
+	Money money;
 	int ex;
 	int ey;
 	int sx, sy, x, y;
diff --git a/src/station_gui.cpp b/src/station_gui.cpp
index 045f927b99..dd8e8a99c9 100644
--- a/src/station_gui.cpp
+++ b/src/station_gui.cpp
@@ -131,14 +131,14 @@ static int CDECL StationWaitingSorter(const void *a, const void *b)
 {
 	const Station* st1 = *(const Station**)a;
 	const Station* st2 = *(const Station**)b;
-	int sum1 = 0, sum2 = 0;
+	Money sum1 = 0, sum2 = 0;
 
 	for (CargoID j = 0; j < NUM_CARGO; j++) {
 		if (st1->goods[j].waiting_acceptance & 0xfff) sum1 += GetTransportedGoodsIncome(st1->goods[j].waiting_acceptance & 0xfff, 20, 50, j);
 		if (st2->goods[j].waiting_acceptance & 0xfff) sum2 += GetTransportedGoodsIncome(st2->goods[j].waiting_acceptance & 0xfff, 20, 50, j);
 	}
 
-	return (_internal_sort_order & 1) ? sum2 - sum1 : sum1 - sum2;
+	return (_internal_sort_order & 1) ? ClampToI32(sum2 - sum1) : ClampToI32(sum1 - sum2);
 }
 
 /**
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index 565a7ecec1..bb46c0c176 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -41,7 +41,7 @@ extern const byte _town_action_costs[8];
  */
 uint GetMaskOfTownActions(int *nump, PlayerID pid, const Town *t)
 {
-	int32 avail, ref;
+	Money avail, ref;
 	int num = 0;
 	uint avail_buttons = 0x7F; // by default all buttons except bribe are enabled.
 	uint buttons = 0;
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index 065e6db02f..1d5a888773 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -1248,7 +1248,7 @@ CommandCost CmdSellRailWagon(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 				IsTrainEngine(v)) ? v->u.rail.other_multiheaded_part : NULL;
 
 			if (rear != NULL) {
-				cost.AddCost(-(int64)rear->value);
+				cost.AddCost(-rear->value);
 				if (flags & DC_EXEC) {
 					UnlinkWagon(rear, first);
 					DeleteDepotHighlightOfVehicle(rear);
diff --git a/src/variables.h b/src/variables.h
index a45ef3e6e0..d62c6f2508 100644
--- a/src/variables.h
+++ b/src/variables.h
@@ -286,7 +286,7 @@ VARDEF uint32 _news_display_opt;
 VARDEF bool _news_ticker_sound;
 
 VARDEF StringID _error_message;
-VARDEF int32 _additional_cash_required;
+VARDEF Money _additional_cash_required;
 
 VARDEF uint32 _decode_parameters[20];
 
diff --git a/src/vehicle_gui.cpp b/src/vehicle_gui.cpp
index fca73e38b7..b9bd7bb316 100644
--- a/src/vehicle_gui.cpp
+++ b/src/vehicle_gui.cpp
@@ -589,7 +589,7 @@ static int CDECL VehicleProfitThisYearSorter(const void *a, const void *b)
 {
 	const Vehicle* va = *(const Vehicle**)a;
 	const Vehicle* vb = *(const Vehicle**)b;
-	int r = va->profit_this_year - vb->profit_this_year;
+	int r = ClampToI32(va->profit_this_year - vb->profit_this_year);
 
 	VEHICLEUNITNUMBERSORTER(r, va, vb);
 
@@ -600,7 +600,7 @@ static int CDECL VehicleProfitLastYearSorter(const void *a, const void *b)
 {
 	const Vehicle* va = *(const Vehicle**)a;
 	const Vehicle* vb = *(const Vehicle**)b;
-	int r = va->profit_last_year - vb->profit_last_year;
+	int r = ClampToI32(va->profit_last_year - vb->profit_last_year);
 
 	VEHICLEUNITNUMBERSORTER(r, va, vb);
 
@@ -687,13 +687,12 @@ static int CDECL VehicleValueSorter(const void *a, const void *b)
 	const Vehicle* va = *(const Vehicle**)a;
 	const Vehicle* vb = *(const Vehicle**)b;
 	const Vehicle *u;
-	int valuea = 0, valueb = 0;
-	int r;
+	Money valuea = 0, valueb = 0;
 
 	for (u = va; u != NULL; u = u->next) valuea += u->value;
 	for (u = vb; u != NULL; u = u->next) valueb += u->value;
 
-	r = valuea - valueb;
+	int r = ClampToI32(valuea - valueb);
 
 	VEHICLEUNITNUMBERSORTER(r, va, vb);