diff --git a/src/script/api/script_group.cpp b/src/script/api/script_group.cpp
index 5dcf1a60d1..455e789938 100644
--- a/src/script/api/script_group.cpp
+++ b/src/script/api/script_group.cpp
@@ -28,7 +28,7 @@
 {
 	EnforceDeityOrCompanyModeValid(false);
 	const Group *g = ::Group::GetIfValid(group_id);
-	return g != nullptr && g->owner == ScriptObject::GetCompany();
+	return g != nullptr && (g->owner == ScriptObject::GetCompany() || ScriptCompanyMode::IsDeity());
 }
 
 /* static */ ScriptCompany::CompanyID ScriptGroup::GetOwner(GroupID group_id)
@@ -117,23 +117,29 @@
 
 /* static */ SQInteger ScriptGroup::GetNumEngines(GroupID group_id, EngineID engine_id)
 {
-	EnforceCompanyModeValid(-1);
+	if (group_id == GROUP_DEFAULT || group_id == GROUP_ALL) EnforceCompanyModeValid(-1);
+	EnforceDeityOrCompanyModeValid(-1);
 	if (!ScriptEngine::IsValidEngine(engine_id)) return -1;
 	bool valid_group = IsValidGroup(group_id);
 	if (!valid_group && group_id != GROUP_DEFAULT && group_id != GROUP_ALL) return -1;
 	if (valid_group && ScriptEngine::GetVehicleType(engine_id) != GetVehicleType(group_id)) return -1;
 
-	return GetGroupNumEngines(ScriptObject::GetCompany(), group_id, engine_id);
+	::CompanyID company = (valid_group && ScriptCompanyMode::IsDeity()) ? ::Group::Get(group_id)->owner : ScriptObject::GetCompany();
+
+	return GetGroupNumEngines(company, group_id, engine_id);
 }
 
 /* static */ SQInteger ScriptGroup::GetNumVehicles(GroupID group_id, ScriptVehicle::VehicleType vehicle_type)
 {
-	EnforceCompanyModeValid(-1);
+	if (group_id == GROUP_DEFAULT || group_id == GROUP_ALL) EnforceCompanyModeValid(-1);
+	EnforceDeityOrCompanyModeValid(-1);
 	bool valid_group = IsValidGroup(group_id);
 	if (!valid_group && group_id != GROUP_DEFAULT && group_id != GROUP_ALL) return -1;
 	if (!valid_group && (vehicle_type < ScriptVehicle::VT_RAIL || vehicle_type > ScriptVehicle::VT_AIR)) return -1;
 
-	return GetGroupNumVehicle(ScriptObject::GetCompany(), group_id, valid_group ? ::Group::Get(group_id)->vehicle_type : (::VehicleType)vehicle_type);
+	::CompanyID company = (valid_group && ScriptCompanyMode::IsDeity()) ? ::Group::Get(group_id)->owner : ScriptObject::GetCompany();
+
+	return GetGroupNumVehicle(company, group_id, valid_group ? ::Group::Get(group_id)->vehicle_type : (::VehicleType)vehicle_type);
 }
 
 /* static */ bool ScriptGroup::MoveVehicle(GroupID group_id, VehicleID vehicle_id)
@@ -170,10 +176,14 @@
 
 /* static */ EngineID ScriptGroup::GetEngineReplacement(GroupID group_id, EngineID engine_id)
 {
-	EnforceCompanyModeValid(::EngineID::Invalid());
-	if (!IsValidGroup(group_id) && group_id != GROUP_DEFAULT && group_id != GROUP_ALL) return ::EngineID::Invalid();
+	if (group_id == GROUP_DEFAULT || group_id == GROUP_ALL) EnforceCompanyModeValid(::EngineID::Invalid());
+	EnforceDeityOrCompanyModeValid(::EngineID::Invalid());
+	bool valid_group = IsValidGroup(group_id);
+	if (!valid_group && group_id != GROUP_DEFAULT && group_id != GROUP_ALL) return ::EngineID::Invalid();
 
-	return ::EngineReplacementForCompany(Company::Get(ScriptObject::GetCompany()), engine_id, group_id);
+	::CompanyID company = (valid_group && ScriptCompanyMode::IsDeity()) ? ::Group::Get(group_id)->owner : ScriptObject::GetCompany();
+
+	return ::EngineReplacementForCompany(Company::Get(company), engine_id, group_id);
 }
 
 /* static */ bool ScriptGroup::StopAutoReplace(GroupID group_id, EngineID engine_id)
diff --git a/src/script/api/script_group.hpp b/src/script/api/script_group.hpp
index 2dd978afb9..f22eed6a2d 100644
--- a/src/script/api/script_group.hpp
+++ b/src/script/api/script_group.hpp
@@ -134,7 +134,7 @@ public:
 	 * @pre ScriptEngine::IsValidEngine(engine_id).
 	 * @pre (IsValidGroup(group_id) && ScriptEngine::GetVehicleType(engine_id) == GetVehicleType(group_id)) ||
 	     group_id == GROUP_ALL || group_id == GROUP_DEFAULT.
-	 * @game @pre ScriptCompanyMode::IsValid().
+	 * @game @pre ScriptCompanyMode::IsValid() when group_id == GROUP_ALL || group_id == GROUP_DEFAULT.
 	 * @return The number of engines with id engine_id in the group with id group_id.
 	 */
 	static SQInteger GetNumEngines(GroupID group_id, EngineID engine_id);
@@ -146,7 +146,7 @@ public:
 	 * @pre IsValidGroup(group_id) || group_id == GROUP_ALL || group_id == GROUP_DEFAULT.
 	 * @pre IsValidGroup(group_id) || vehicle_type == ScriptVehicle::VT_ROAD || vehicle_type == ScriptVehicle::VT_RAIL ||
 	 *   vehicle_type == ScriptVehicle::VT_WATER || vehicle_type == ScriptVehicle::VT_AIR
-	 * @game @pre ScriptCompanyMode::IsValid().
+	 * @game @pre ScriptCompanyMode::IsValid() when group_id == GROUP_ALL || group_id == GROUP_DEFAULT.
 	 * @return The total number of vehicles in the group with id group_id and it's sub-groups.
 	 * @note If the group is valid (neither GROUP_ALL nor GROUP_DEFAULT), the value of
 	 *  vehicle_type is retrieved from the group itself and not from the input value.
@@ -194,7 +194,7 @@ public:
 	 * @param engine_id_new The engine id to replace with.
 	 * @pre IsValidGroup(group_id) || group_id == GROUP_DEFAULT || group_id == GROUP_ALL.
 	 * @pre ScriptEngine.IsBuildable(engine_id_new).
-	 * @game @pre ScriptCompanyMode::IsValid().
+	 * @game @pre ScriptCompanyMode::IsValid() when group_id == GROUP_ALL || group_id == GROUP_DEFAULT.
 	 * @return True if and if the replacing was successfully started.
 	 * @note To stop autoreplacing engine_id_old, call StopAutoReplace(group_id, engine_id_old).
 	 */
diff --git a/src/script/api/script_grouplist.cpp b/src/script/api/script_grouplist.cpp
index c0aa69e7af..adcb7c5f3b 100644
--- a/src/script/api/script_grouplist.cpp
+++ b/src/script/api/script_grouplist.cpp
@@ -16,9 +16,12 @@
 
 ScriptGroupList::ScriptGroupList(HSQUIRRELVM vm)
 {
-	EnforceCompanyModeValid_Void();
+	EnforceDeityOrCompanyModeValid_Void();
+
+	bool is_deity = ScriptCompanyMode::IsDeity();
 	::CompanyID owner = ScriptObject::GetCompany();
+
 	ScriptList::FillList<Group>(vm, this,
-		[owner](const Group *g) { return g->owner == owner; }
+		[owner, is_deity](const Group *g) { return g->owner == owner || is_deity; }
 	);
 }
diff --git a/src/script/api/script_grouplist.hpp b/src/script/api/script_grouplist.hpp
index c4b2bb4fcc..daec8f1789 100644
--- a/src/script/api/script_grouplist.hpp
+++ b/src/script/api/script_grouplist.hpp
@@ -21,9 +21,6 @@
 class ScriptGroupList : public ScriptList {
 public:
 #ifdef DOXYGEN_API
-	/**
-	 * @game @pre ScriptCompanyMode::IsValid().
-	 */
 	ScriptGroupList();
 
 	/**
diff --git a/src/script/api/script_vehiclelist.cpp b/src/script/api/script_vehiclelist.cpp
index 68113654e5..c91a238990 100644
--- a/src/script/api/script_vehiclelist.cpp
+++ b/src/script/api/script_vehiclelist.cpp
@@ -106,26 +106,28 @@ ScriptVehicleList_SharedOrders::ScriptVehicleList_SharedOrders(VehicleID vehicle
 
 ScriptVehicleList_Group::ScriptVehicleList_Group(GroupID group_id)
 {
-	EnforceCompanyModeValid_Void();
+	EnforceDeityOrCompanyModeValid_Void();
 	if (!ScriptGroup::IsValidGroup(group_id)) return;
 
+	bool is_deity = ScriptCompanyMode::IsDeity();
 	::CompanyID owner = ScriptObject::GetCompany();
 
 	ScriptList::FillList<Vehicle>(this,
-		[owner](const Vehicle *v) { return v->owner == owner && v->IsPrimaryVehicle(); },
+		[owner, is_deity](const Vehicle *v) { return (v->owner == owner || is_deity) && v->IsPrimaryVehicle(); },
 		[group_id](const Vehicle *v) { return v->group_id == group_id; }
 	);
 }
 
 ScriptVehicleList_DefaultGroup::ScriptVehicleList_DefaultGroup(ScriptVehicle::VehicleType vehicle_type)
 {
-	EnforceCompanyModeValid_Void();
+	EnforceDeityOrCompanyModeValid_Void();
 	if (vehicle_type < ScriptVehicle::VT_RAIL || vehicle_type > ScriptVehicle::VT_AIR) return;
 
+	bool is_deity = ScriptCompanyMode::IsDeity();
 	::CompanyID owner = ScriptObject::GetCompany();
 
 	ScriptList::FillList<Vehicle>(this,
-		[owner](const Vehicle *v) { return v->owner == owner && v->IsPrimaryVehicle(); },
+		[owner, is_deity](const Vehicle *v) { return (v->owner == owner || is_deity) && v->IsPrimaryVehicle(); },
 		[vehicle_type](const Vehicle *v) { return v->type == (::VehicleType)vehicle_type && v->group_id == ScriptGroup::GROUP_DEFAULT; }
 	);
 }
diff --git a/src/script/api/script_vehiclelist.hpp b/src/script/api/script_vehiclelist.hpp
index ad4b3cb0ef..20b20b6f34 100644
--- a/src/script/api/script_vehiclelist.hpp
+++ b/src/script/api/script_vehiclelist.hpp
@@ -104,7 +104,6 @@ class ScriptVehicleList_Group : public ScriptList {
 public:
 	/**
 	 * @param group_id The ID of the group the vehicles are in.
-	 * @game @pre ScriptCompanyMode::IsValid().
 	 */
 	ScriptVehicleList_Group(GroupID group_id);
 };
@@ -118,7 +117,6 @@ class ScriptVehicleList_DefaultGroup : public ScriptList {
 public:
 	/**
 	 * @param vehicle_type The VehicleType to get the list of vehicles for.
-	 * @game @pre ScriptCompanyMode::IsValid().
 	 */
 	ScriptVehicleList_DefaultGroup(ScriptVehicle::VehicleType vehicle_type);
 };