diff --git a/bin/ai/compat_0.7.nut b/bin/ai/compat_0.7.nut
new file mode 100644
index 0000000000..c38234a3a0
--- /dev/null
+++ b/bin/ai/compat_0.7.nut
@@ -0,0 +1,71 @@
+/* $Id$ */
+
+AISign.GetMaxSignID <- function()
+{
+	AILog.Warning("AISign::GetMaxSignID is deprecated and will be removed soon, please use AISignList instead.");
+	local list = AISignList();
+	local max_id = 0;
+	foreach (id, d in list) {
+		if (id > max_id) max_id = id;
+	}
+	return max_id;
+}
+
+AITile.GetHeight <- function(tile)
+{
+	AILog.Warning("AITile::GetHeight is deprecated and will be removed soon, please use GetMinHeight/GetMaxHeight/GetCornerHeight instead.");
+	if (!AIMap.IsValidTile(tile)) return -1;
+
+	return AITile.GetCornerHeight(tile, AITile.CORNER_N);
+}
+
+AIOrder.ChangeOrder <- function(vehicle_id, order_position, order_flags)
+{
+	AILog.Warning("AIOrder::ChangeOrder is deprecated and will be removed soon, please use AIOrder::SetOrderFlags instead.")
+
+	return AIOrder.SetOrderFlags(vehicle_id, order_position, order_flags);
+}
+
+AIWaypoint.WAYPOINT_INVALID <- 0xFFFF;
+
+AISubsidy.SourceIsTown <- function(subsidy_id)
+{
+	AILog.Warning("AISubsidy::SourceIsTown is deprecated and will be removed soon, please use AISubsidy::GetSourceType instead.");
+	if (!AISubsidy.IsValidSubsidy(subsidy_id) || AISubsidy.IsAwarded(subsidy_id)) return false;
+
+	return AISubsidy.GetSourceType(subsidy_id) == AISubsidy.SPT_TOWN;
+}
+
+AISubsidy.GetSource <- function(subsidy_id)
+{
+	AILog.Warning("AISubsidy::GetSource is deprecated and will be removed soon, please use AISubsidy::GetSourceIndex instead.");
+	if (!AISubsidy.IsValidSubsidy(subsidy_id)) return AIBaseStation.INVALID_STATION;
+
+	if (AISubsidy.IsAwarded(subsidy_id)) {
+		AILog.Error("AISubsidy::GetSource returned INVALID_STATION due to internal changes in the Subsidy logic.");
+		return AIBaseStation.INVALID_STATION;
+	}
+
+	return AISubsidy.GetSourceIndex(subsidy_id);
+}
+
+AISubsidy.DestinationIsTown <- function(subsidy_id)
+{
+	AILog.Warning("AISubsidy::DestinationIsTown is deprecated and will be removed soon, please use AISubsidy::GetDestinationType instead.");
+	if (!AISubsidy.IsValidSubsidy(subsidy_id) || AISubsidy.IsAwarded(subsidy_id)) return false;
+
+	return AISubsidy.GetDestinationType(subsidy_id) == AISubsidy.SPT_TOWN;
+}
+
+AISubsidy.GetDestination <- function(subsidy_id)
+{
+	AILog.Warning("AISubsidy::GetDestination is deprecated and will be removed soon, please use AISubsidy::GetDestinationIndex instead.");
+	if (!AISubsidy.IsValidSubsidy(subsidy_id)) return AIBaseStation.INVALID_STATION;
+
+	if (AISubsidy.IsAwarded(subsidy_id)) {
+		AILog.Error("AISubsidy::GetDestination returned INVALID_STATION due to internal changes in the Subsidy logic.");
+		return AIBaseStation.INVALID_STATION;
+	}
+
+	return AISubsidy.GetDestinationIndex(subsidy_id);
+}
diff --git a/bin/ai/compat_0.8.nut b/bin/ai/compat_0.8.nut
new file mode 100644
index 0000000000..a0749a0c2c
--- /dev/null
+++ b/bin/ai/compat_0.8.nut
@@ -0,0 +1 @@
+/* $Id$ */
diff --git a/bin/ai/regression/regression.nut b/bin/ai/regression/regression.nut
index 5e1ab100a5..c5b7d2cfb4 100644
--- a/bin/ai/regression/regression.nut
+++ b/bin/ai/regression/regression.nut
@@ -1204,7 +1204,7 @@ function Regression::TileList()
 	list.AddRectangle(34436, 256 * 2 + 34436 + 8);
 	print("  Count():             " + list.Count());
 
-	list.Valuate(AITile.GetHeight);
+	list.Valuate(AITile.GetCornerHeight, AITile.CORNER_N);
 	print("  Height():            done");
 	print("  Count():             " + list.Count());
 	print("  ListDump:");
diff --git a/bin/ai/regression/regression_info.nut b/bin/ai/regression/regression_info.nut
index 5eb8201c77..8c870c5710 100644
--- a/bin/ai/regression/regression_info.nut
+++ b/bin/ai/regression/regression_info.nut
@@ -6,6 +6,7 @@ class Regression extends AIInfo {
 	function GetShortName()   { return "REGR"; }
 	function GetDescription() { return "This runs regression-tests on all commands. On the same map the result should always be the same."; }
 	function GetVersion()     { return 1; }
+	function GetAPIVersion()  { return "0.8"; }
 	function GetDate()        { return "2007-03-18"; }
 	function CreateInstance() { return "Regression"; }
 }
diff --git a/src/ai/ai_info.cpp b/src/ai/ai_info.cpp
index 0ae9582ed8..22e2dcdeda 100644
--- a/src/ai/ai_info.cpp
+++ b/src/ai/ai_info.cpp
@@ -12,6 +12,7 @@
 #include "ai_scanner.hpp"
 #include "../settings_type.h"
 #include "../openttd.h"
+#include "../debug.h"
 
 AIConfigItem _start_date_config = {
 	"start_date",
@@ -42,6 +43,11 @@ AILibrary::~AILibrary()
 	return 0;
 }
 
+static bool CheckAPIVersion(const char *api_version)
+{
+	return strcmp(api_version, "0.7") == 0 || strcmp(api_version, "0.8") == 0;
+}
+
 /* static */ SQInteger AIInfo::Constructor(HSQUIRRELVM vm)
 {
 	/* Get the AIInfo */
@@ -72,6 +78,16 @@ AILibrary::~AILibrary()
 	} else {
 		info->use_as_random = true;
 	}
+	/* Try to get the API version the AI is written for. */
+	if (info->engine->MethodExists(*info->SQ_instance, "GetAPIVersion")) {
+		if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAPIVersion", &info->api_version)) return SQ_ERROR;
+		if (!CheckAPIVersion(info->api_version)) {
+			DEBUG(ai, 1, "Loading info.nut from (%s.%d): GetAPIVersion returned invalid version", info->GetName(), info->GetVersion());
+			return SQ_ERROR;
+		}
+	} else {
+		info->api_version = strdup("0.7");
+	}
 
 	/* Remove the link to the real instance, else it might get deleted by RegisterAI() */
 	sq_setinstanceup(vm, 2, NULL);
@@ -86,6 +102,7 @@ AILibrary::~AILibrary()
 	SQUserPointer instance;
 	sq_getinstanceup(vm, 2, &instance, 0);
 	AIInfo *info = (AIInfo *)instance;
+	info->api_version = NULL;
 
 	SQInteger res = AIFileInfo::Constructor(vm, info);
 	if (res != 0) return res;
@@ -116,6 +133,7 @@ AIInfo::~AIInfo()
 		}
 	}
 	this->config_list.clear();
+	free((void*)this->api_version);
 }
 
 bool AIInfo::CanLoadFromVersion(int version) const
diff --git a/src/ai/ai_info.hpp b/src/ai/ai_info.hpp
index 81b1def3ed..0a6e51edaa 100644
--- a/src/ai/ai_info.hpp
+++ b/src/ai/ai_info.hpp
@@ -99,10 +99,16 @@ public:
 	 */
 	bool UseAsRandomAI() const { return this->use_as_random; }
 
+	/**
+	 * Get the API version this AI is written for.
+	 */
+	const char *GetAPIVersion() const { return this->api_version; }
+
 private:
 	AIConfigItemList config_list;
 	int min_loadable_version;
 	bool use_as_random;
+	const char *api_version;
 };
 
 class AILibrary : public AIFileInfo {
diff --git a/src/ai/ai_instance.cpp b/src/ai/ai_instance.cpp
index f5a78e2696..6d3397a709 100644
--- a/src/ai/ai_instance.cpp
+++ b/src/ai/ai_instance.cpp
@@ -80,6 +80,8 @@
 
 #undef DEFINE_SCRIPT_FILES
 
+#include "../fileio_func.h"
+
 AIStorage::~AIStorage()
 {
 	/* Free our pointers */
@@ -121,6 +123,11 @@ AIInstance::AIInstance(AIInfo *info) :
 	/* Register the API functions and classes */
 	this->RegisterAPI();
 
+	if (!this->LoadCompatibilityScripts(info->GetAPIVersion())) {
+		this->Died();
+		return;
+	}
+
 	/* Load and execute the script for this AI */
 	const char *main_script = info->GetMainScript();
 	if (strcmp(main_script, "%_dummy") == 0) {
@@ -239,6 +246,28 @@ void AIInstance::RegisterAPI()
 	this->engine->SetGlobalPointer(this->engine);
 }
 
+bool AIInstance::LoadCompatibilityScripts(const char *api_version)
+{
+	char script_name[32];
+	seprintf(script_name, lastof(script_name), "compat_%s.nut", api_version);
+	char buf[MAX_PATH];
+	Searchpath sp;
+	FOR_ALL_SEARCHPATHS(sp) {
+		FioAppendDirectory(buf, MAX_PATH, sp, AI_DIR);
+		ttd_strlcat(buf, script_name, MAX_PATH);
+		if (!FileExists(buf)) continue;
+
+		if (this->engine->LoadScript(buf)) return true;
+
+		AILog::Error("Failed to load API compatibility script");
+		DEBUG(ai, 0, "Error compiling / running API compatibility script: %s", buf);
+		return false;
+	}
+
+	AILog::Warning("API compatibility script not found");
+	return true;
+}
+
 void AIInstance::Continue()
 {
 	assert(this->suspend < 0);
diff --git a/src/ai/ai_instance.hpp b/src/ai/ai_instance.hpp
index 41653dba1c..f260d46d4e 100644
--- a/src/ai/ai_instance.hpp
+++ b/src/ai/ai_instance.hpp
@@ -130,6 +130,11 @@ private:
 	 */
 	void RegisterAPI();
 
+	/**
+	 * Load squirrel scipts to emulate an older API.
+	 */
+	bool LoadCompatibilityScripts(const char *api_version);
+
 	/**
 	 * Tell the AI it died.
 	 */
diff --git a/src/ai/api/ai_basestation.hpp b/src/ai/api/ai_basestation.hpp
index 609d350c24..52e0b79fc8 100644
--- a/src/ai/api/ai_basestation.hpp
+++ b/src/ai/api/ai_basestation.hpp
@@ -23,7 +23,6 @@ public:
 		STATION_NEW = 0xFFFD,           //!< Build a new station
 		STATION_JOIN_ADJACENT = 0xFFFE, //!< Join an neighbouring station if one exists
 		STATION_INVALID = 0xFFFF,       //!< Invalid station id.
-		WAYPOINT_INVALID = 0xFFFF,      //!< @deprecated Use STATION_INVALID instead.
 	};
 
 	/**
diff --git a/src/ai/api/ai_basestation.hpp.sq b/src/ai/api/ai_basestation.hpp.sq
index abbf7e69b9..315b2be3a4 100644
--- a/src/ai/api/ai_basestation.hpp.sq
+++ b/src/ai/api/ai_basestation.hpp.sq
@@ -24,7 +24,6 @@ void SQAIBaseStation_Register(Squirrel *engine) {
 	SQAIBaseStation.DefSQConst(engine, AIBaseStation::STATION_NEW,           "STATION_NEW");
 	SQAIBaseStation.DefSQConst(engine, AIBaseStation::STATION_JOIN_ADJACENT, "STATION_JOIN_ADJACENT");
 	SQAIBaseStation.DefSQConst(engine, AIBaseStation::STATION_INVALID,       "STATION_INVALID");
-	SQAIBaseStation.DefSQConst(engine, AIBaseStation::WAYPOINT_INVALID,      "WAYPOINT_INVALID");
 
 	SQAIBaseStation.DefSQStaticMethod(engine, &AIBaseStation::IsValidBaseStation,  "IsValidBaseStation",  2, ".i");
 	SQAIBaseStation.DefSQStaticMethod(engine, &AIBaseStation::GetName,             "GetName",             2, ".i");
diff --git a/src/ai/api/ai_order.cpp b/src/ai/api/ai_order.cpp
index 50d94d3465..0cc9a88fc3 100644
--- a/src/ai/api/ai_order.cpp
+++ b/src/ai/api/ai_order.cpp
@@ -476,12 +476,6 @@ static void _DoCommandReturnSetOrderFlags(class AIInstance *instance)
 	return AIOrder::_SetOrderFlags();
 }
 
-/* static */ bool AIOrder::ChangeOrder(VehicleID vehicle_id, OrderPosition order_position, AIOrder::AIOrderFlags order_flags)
-{
-	AILog::Warning("AIOrder::ChangeOrder is deprecated and will be removed soon, please use AIOrder::SetOrderFlags instead.");
-	return SetOrderFlags(vehicle_id, order_position, order_flags);
-}
-
 /* static */ bool AIOrder::MoveOrder(VehicleID vehicle_id, OrderPosition order_position_move, OrderPosition order_position_target)
 {
 	order_position_move   = AIOrder::ResolveOrderPosition(vehicle_id, order_position_move);
diff --git a/src/ai/api/ai_order.hpp b/src/ai/api/ai_order.hpp
index c04ffd7997..1f56d458e1 100644
--- a/src/ai/api/ai_order.hpp
+++ b/src/ai/api/ai_order.hpp
@@ -403,11 +403,6 @@ public:
 	 */
 	static bool SetOrderFlags(VehicleID vehicle_id, OrderPosition order_position, AIOrderFlags order_flags);
 
-	/**
-	 * @Deprecated, use SetOrderFlags instead.
-	 */
-	static bool ChangeOrder(VehicleID vehicle_id, OrderPosition order_position, AIOrderFlags order_flags);
-
 	/**
 	 * Move an order inside the orderlist
 	 * @param vehicle_id The vehicle to move the orders.
diff --git a/src/ai/api/ai_order.hpp.sq b/src/ai/api/ai_order.hpp.sq
index 5b3f0ce083..d02e8ee427 100644
--- a/src/ai/api/ai_order.hpp.sq
+++ b/src/ai/api/ai_order.hpp.sq
@@ -99,7 +99,6 @@ void SQAIOrder_Register(Squirrel *engine) {
 	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::InsertConditionalOrder,        "InsertConditionalOrder",        4, ".iii");
 	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::RemoveOrder,                   "RemoveOrder",                   3, ".ii");
 	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::SetOrderFlags,                 "SetOrderFlags",                 4, ".iii");
-	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::ChangeOrder,                   "ChangeOrder",                   4, ".iii");
 	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::MoveOrder,                     "MoveOrder",                     4, ".iii");
 	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::SkipToOrder,                   "SkipToOrder",                   3, ".ii");
 	SQAIOrder.DefSQStaticMethod(engine, &AIOrder::CopyOrders,                    "CopyOrders",                    3, ".ii");
diff --git a/src/ai/api/ai_sign.cpp b/src/ai/api/ai_sign.cpp
index 326f1211d3..e9c1c58ee8 100644
--- a/src/ai/api/ai_sign.cpp
+++ b/src/ai/api/ai_sign.cpp
@@ -14,12 +14,6 @@
 #include "../../tile_map.h"
 #include "../../company_func.h"
 
-/* static */ SignID AISign::GetMaxSignID()
-{
-	AILog::Warning("AISign::GetMaxSignID is deprecated and will be removed soon, please use AISignList instead.");
-	return (SignID)::Sign::GetPoolSize();
-}
-
 /* static */ bool AISign::IsValidSign(SignID sign_id)
 {
 	const Sign *si = ::Sign::GetIfValid(sign_id);
diff --git a/src/ai/api/ai_sign.hpp b/src/ai/api/ai_sign.hpp
index e7e20dc460..9c6347d992 100644
--- a/src/ai/api/ai_sign.hpp
+++ b/src/ai/api/ai_sign.hpp
@@ -28,14 +28,6 @@ public:
 		ERR_SIGN_TOO_MANY_SIGNS,             // [STR_ERROR_TOO_MANY_SIGNS]
 	};
 
-	/**
-	 * Gets the maximum sign index; there are no valid signs with a higher index.
-	 * @deprecated This function is deprecated and might be removed in future versions of the API. Use AISignList() instead.
-	 * @return The maximum sign index.
-	 * @post Return value is always non-negative.
-	 */
-	static SignID GetMaxSignID();
-
 	/**
 	 * Checks whether the given sign index is valid.
 	 * @param sign_id The index to check.
diff --git a/src/ai/api/ai_sign.hpp.sq b/src/ai/api/ai_sign.hpp.sq
index 33ac6720b5..2c5ef8039f 100644
--- a/src/ai/api/ai_sign.hpp.sq
+++ b/src/ai/api/ai_sign.hpp.sq
@@ -28,13 +28,12 @@ void SQAISign_Register(Squirrel *engine) {
 
 	AIError::RegisterErrorMapString(AISign::ERR_SIGN_TOO_MANY_SIGNS, "ERR_SIGN_TOO_MANY_SIGNS");
 
-	SQAISign.DefSQStaticMethod(engine, &AISign::GetMaxSignID, "GetMaxSignID", 1, ".");
-	SQAISign.DefSQStaticMethod(engine, &AISign::IsValidSign,  "IsValidSign",  2, ".i");
-	SQAISign.DefSQStaticMethod(engine, &AISign::SetName,      "SetName",      3, ".is");
-	SQAISign.DefSQStaticMethod(engine, &AISign::GetName,      "GetName",      2, ".i");
-	SQAISign.DefSQStaticMethod(engine, &AISign::GetLocation,  "GetLocation",  2, ".i");
-	SQAISign.DefSQStaticMethod(engine, &AISign::BuildSign,    "BuildSign",    3, ".is");
-	SQAISign.DefSQStaticMethod(engine, &AISign::RemoveSign,   "RemoveSign",   2, ".i");
+	SQAISign.DefSQStaticMethod(engine, &AISign::IsValidSign, "IsValidSign", 2, ".i");
+	SQAISign.DefSQStaticMethod(engine, &AISign::SetName,     "SetName",     3, ".is");
+	SQAISign.DefSQStaticMethod(engine, &AISign::GetName,     "GetName",     2, ".i");
+	SQAISign.DefSQStaticMethod(engine, &AISign::GetLocation, "GetLocation", 2, ".i");
+	SQAISign.DefSQStaticMethod(engine, &AISign::BuildSign,   "BuildSign",   3, ".is");
+	SQAISign.DefSQStaticMethod(engine, &AISign::RemoveSign,  "RemoveSign",  2, ".i");
 
 	SQAISign.PostRegister(engine);
 }
diff --git a/src/ai/api/ai_subsidy.cpp b/src/ai/api/ai_subsidy.cpp
index df6889ac70..3a0629c77d 100644
--- a/src/ai/api/ai_subsidy.cpp
+++ b/src/ai/api/ai_subsidy.cpp
@@ -50,27 +50,6 @@
 	return ::Subsidy::Get(subsidy_id)->cargo_type;
 }
 
-/* static */ bool AISubsidy::SourceIsTown(SubsidyID subsidy_id)
-{
-	AILog::Warning("AISubsidy::SourceIsTown is deprecated and will be removed soon, please use AISubsidy::GetSourceType instead.");
-	if (!IsValidSubsidy(subsidy_id) || IsAwarded(subsidy_id)) return false;
-
-	return ::Subsidy::Get(subsidy_id)->src_type == ST_TOWN;
-}
-
-/* static */ int32 AISubsidy::GetSource(SubsidyID subsidy_id)
-{
-	AILog::Warning("AISubsidy::GetSource is deprecated and will be removed soon, please use AISubsidy::GetSourceIndex instead.");
-	if (!IsValidSubsidy(subsidy_id)) return INVALID_STATION;
-
-	if (IsAwarded(subsidy_id)) {
-		AILog::Error("AISubsidy::GetSource returned INVALID_STATION due to internal changes in the Subsidy logic.");
-		return INVALID_STATION;
-	}
-
-	return ::Subsidy::Get(subsidy_id)->src;
-}
-
 /* static */ AISubsidy::SubsidyParticipantType AISubsidy::GetSourceType(SubsidyID subsidy_id)
 {
 	if (!IsValidSubsidy(subsidy_id)) return SPT_INVALID;
@@ -85,27 +64,6 @@
 	return ::Subsidy::Get(subsidy_id)->src;
 }
 
-/* static */ bool AISubsidy::DestinationIsTown(SubsidyID subsidy_id)
-{
-	AILog::Warning("AISubsidy::DestinationIsTown is deprecated and will be removed soon, please use AISubsidy::GetDestinationType instead.");
-	if (!IsValidSubsidy(subsidy_id) || IsAwarded(subsidy_id)) return false;
-
-	return ::Subsidy::Get(subsidy_id)->dst_type == ST_TOWN;
-}
-
-/* static */ int32 AISubsidy::GetDestination(SubsidyID subsidy_id)
-{
-	AILog::Warning("AISubsidy::GetDestination is deprecated and will be removed soon, please use AISubsidy::GetDestinationIndex instead.");
-	if (!IsValidSubsidy(subsidy_id)) return INVALID_STATION;
-
-	if (IsAwarded(subsidy_id)) {
-		AILog::Error("AISubsidy::GetDestination returned INVALID_STATION due to internal changes in the Subsidy logic.");
-		return INVALID_STATION;
-	}
-
-	return ::Subsidy::Get(subsidy_id)->dst;
-}
-
 /* static */ AISubsidy::SubsidyParticipantType AISubsidy::GetDestinationType(SubsidyID subsidy_id)
 {
 	if (!IsValidSubsidy(subsidy_id)) return SPT_INVALID;
diff --git a/src/ai/api/ai_subsidy.hpp b/src/ai/api/ai_subsidy.hpp
index b4d190bbf9..5aa937f22e 100644
--- a/src/ai/api/ai_subsidy.hpp
+++ b/src/ai/api/ai_subsidy.hpp
@@ -69,27 +69,6 @@ public:
 	 */
 	static CargoID GetCargoType(SubsidyID subsidy_id);
 
-	/**
-	 * Is the source of the subsidy a town or an industry.
-	 * @param subsidy_id The SubsidyID to check.
-	 * @pre IsValidSubsidy(subsidy_id) && !IsAwarded(subsidy_id).
-	 * @return True if the source is a town, false if it is an industry.
-	 * @deprecated Use GetSourceType() instead.
-	 */
-	static bool SourceIsTown(SubsidyID subsidy_id);
-
-	/**
-	 * Return the source TownID/IndustryID/StationID the subsidy is for.
-	 * \li IsAwarded(subsidy_id) -> return INVALID_STATION.
-	 * \li !IsAwarded(subsidy_id) && SourceIsTown(subsidy_id) -> return the TownID.
-	 * \li !IsAwarded(subsidy_id) && !SourceIsTown(subsidy_id) -> return the IndustryID.
-	 * @param subsidy_id The SubsidyID to check.
-	 * @pre IsValidSubsidy(subsidy_id).
-	 * @return One of TownID/IndustryID/INVALID_STATION.
-	 * @deprecated Use GetSourceIndex() instead.
-	 */
-	static int32 GetSource(SubsidyID subsidy_id);
-
 	/**
 	 * Returns the type of source of subsidy.
 	 * @param subsidy_id The SubsidyID to check.
@@ -108,27 +87,6 @@ public:
 	 */
 	static int32 GetSourceIndex(SubsidyID subsidy_id);
 
-	/**
-	 * Is the destination of the subsidy a town or an industry.
-	 * @param subsidy_id The SubsidyID to check.
-	 * @pre IsValidSubsidy(subsidy_id) && !IsAwarded(subsidy_id).
-	 * @return True if the destination is a town, false if it is an industry.
-	 * @deprecated Use GetDestinationType() instead.
-	 */
-	static bool DestinationIsTown(SubsidyID subsidy_id);
-
-	/**
-	 * Return the destination TownID/IndustryID/StationID the subsidy is for.
-	 * \li IsAwarded(subsidy_id) -> return INVALID_STATION.
-	 * \li !IsAwarded(subsidy_id) && DestinationIsTown(subsidy_id) -> return the TownID.
-	 * \li !IsAwarded(subsidy_id) && !DestinationIsTown(subsidy_id) -> return the IndustryID.
-	 * @param subsidy_id the SubsidyID to check.
-	 * @pre IsValidSubsidy(subsidy_id).
-	 * @return One of TownID/IndustryID/INVALID_STATION.
-	 * @deprecated Use GetDestinationIndex() instead.
-	 */
-	static int32 GetDestination(SubsidyID subsidy_id);
-
 	/**
 	 * Returns the type of destination of subsidy.
 	 * @param subsidy_id The SubsidyID to check.
diff --git a/src/ai/api/ai_subsidy.hpp.sq b/src/ai/api/ai_subsidy.hpp.sq
index 8221e23384..ad0e348395 100644
--- a/src/ai/api/ai_subsidy.hpp.sq
+++ b/src/ai/api/ai_subsidy.hpp.sq
@@ -30,12 +30,8 @@ void SQAISubsidy_Register(Squirrel *engine) {
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetAwardedTo,        "GetAwardedTo",        2, ".i");
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetExpireDate,       "GetExpireDate",       2, ".i");
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetCargoType,        "GetCargoType",        2, ".i");
-	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::SourceIsTown,        "SourceIsTown",        2, ".i");
-	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetSource,           "GetSource",           2, ".i");
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetSourceType,       "GetSourceType",       2, ".i");
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetSourceIndex,      "GetSourceIndex",      2, ".i");
-	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::DestinationIsTown,   "DestinationIsTown",   2, ".i");
-	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetDestination,      "GetDestination",      2, ".i");
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetDestinationType,  "GetDestinationType",  2, ".i");
 	SQAISubsidy.DefSQStaticMethod(engine, &AISubsidy::GetDestinationIndex, "GetDestinationIndex", 2, ".i");
 
diff --git a/src/ai/api/ai_tile.cpp b/src/ai/api/ai_tile.cpp
index 42b95241aa..78fc27421d 100644
--- a/src/ai/api/ai_tile.cpp
+++ b/src/ai/api/ai_tile.cpp
@@ -130,14 +130,6 @@
 	return (Slope)::ComplementSlope((::Slope)slope);
 }
 
-/* static */ int32 AITile::GetHeight(TileIndex tile)
-{
-	AILog::Warning("AITile::GetHeight is deprecated and will be removed soon, please use GetMinHeight/GetMaxHeight/GetCornerHeight instead.");
-	if (!::IsValidTile(tile)) return -1;
-
-	return ::TileHeight(tile);
-}
-
 /* static */ int32 AITile::GetMinHeight(TileIndex tile)
 {
 	if (!::IsValidTile(tile)) return -1;
diff --git a/src/ai/api/ai_tile.hpp b/src/ai/api/ai_tile.hpp
index b35bcc2704..305770395b 100644
--- a/src/ai/api/ai_tile.hpp
+++ b/src/ai/api/ai_tile.hpp
@@ -232,16 +232,6 @@ public:
 	 */
 	static Slope GetComplementSlope(Slope slope);
 
-	/**
-	 * Get the height of the north corner of a tile.
-	 * The returned height is the height of the bare tile. A possible foundation on the tile does not influence this height.
-	 * @deprecated This function is deprecated and might be removed in future versions of the API. Use GetMinHeight(), GetMaxHeight() or GetCornerHeight() instead.
-	 * @param tile The tile to check on.
-	 * @pre AIMap::IsValidTile(tile).
-	 * @return The height of the north corner of the tile, ranging from 0 to 15.
-	 */
-	static int32 GetHeight(TileIndex tile);
-
 	/**
 	 * Get the minimal height on a tile.
 	 * The returned height is the height of the bare tile. A possible foundation on the tile does not influence this height.
diff --git a/src/ai/api/ai_tile.hpp.sq b/src/ai/api/ai_tile.hpp.sq
index 4c46df1bb5..484ada59e7 100644
--- a/src/ai/api/ai_tile.hpp.sq
+++ b/src/ai/api/ai_tile.hpp.sq
@@ -67,7 +67,7 @@ void SQAITile_Register(Squirrel *engine) {
 
 	AIError::RegisterErrorMap(STR_ERROR_ALREADY_AT_SEA_LEVEL,    AITile::ERR_TILE_TOO_HIGH);
 	AIError::RegisterErrorMap(STR_ERROR_ALREADY_AT_SEA_LEVEL,    AITile::ERR_TILE_TOO_LOW);
-	AIError::RegisterErrorMap(STR_ERROR_ALREADY_LEVELLED,              AITile::ERR_AREA_ALREADY_FLAT);
+	AIError::RegisterErrorMap(STR_ERROR_ALREADY_LEVELLED,        AITile::ERR_AREA_ALREADY_FLAT);
 	AIError::RegisterErrorMap(STR_ERROR_EXCAVATION_WOULD_DAMAGE, AITile::ERR_EXCAVATION_WOULD_DAMAGE);
 
 	AIError::RegisterErrorMapString(AITile::ERR_TILE_TOO_HIGH,           "ERR_TILE_TOO_HIGH");
@@ -90,7 +90,6 @@ void SQAITile_Register(Squirrel *engine) {
 	SQAITile.DefSQStaticMethod(engine, &AITile::IsDesertTile,               "IsDesertTile",               2, ".i");
 	SQAITile.DefSQStaticMethod(engine, &AITile::GetSlope,                   "GetSlope",                   2, ".i");
 	SQAITile.DefSQStaticMethod(engine, &AITile::GetComplementSlope,         "GetComplementSlope",         2, ".i");
-	SQAITile.DefSQStaticMethod(engine, &AITile::GetHeight,                  "GetHeight",                  2, ".i");
 	SQAITile.DefSQStaticMethod(engine, &AITile::GetMinHeight,               "GetMinHeight",               2, ".i");
 	SQAITile.DefSQStaticMethod(engine, &AITile::GetMaxHeight,               "GetMaxHeight",               2, ".i");
 	SQAITile.DefSQStaticMethod(engine, &AITile::GetCornerHeight,            "GetCornerHeight",            3, ".ii");