diff --git a/src/openrct2/actions/BalloonPressAction.hpp b/src/openrct2/actions/BalloonPressAction.hpp
index 1494b4e035..17a800d197 100644
--- a/src/openrct2/actions/BalloonPressAction.hpp
+++ b/src/openrct2/actions/BalloonPressAction.hpp
@@ -23,6 +23,11 @@ public:
     {
     }
 
+    void AcceptParameters(GameActionParameterVisitor & visitor) override
+    {
+        visitor.Visit("id", _spriteIndex);
+    }
+
     uint16_t GetActionFlags() const override
     {
         return GameAction::GetActionFlags();
diff --git a/src/openrct2/actions/BannerSetColourAction.hpp b/src/openrct2/actions/BannerSetColourAction.hpp
index 5bd27c9927..0e50bdfa55 100644
--- a/src/openrct2/actions/BannerSetColourAction.hpp
+++ b/src/openrct2/actions/BannerSetColourAction.hpp
@@ -30,6 +30,12 @@ public:
     {
     }
 
+    void AcceptParameters(GameActionParameterVisitor & visitor) override
+    {
+        visitor.Visit(_loc);
+        visitor.Visit("primaryColour", _primaryColour);
+    }
+
     uint16_t GetActionFlags() const override
     {
         return GameAction::GetActionFlags() | GameActions::Flags::AllowWhilePaused;
diff --git a/src/openrct2/actions/BannerSetNameAction.hpp b/src/openrct2/actions/BannerSetNameAction.hpp
index d49c38d9a9..267d311e50 100644
--- a/src/openrct2/actions/BannerSetNameAction.hpp
+++ b/src/openrct2/actions/BannerSetNameAction.hpp
@@ -34,6 +34,12 @@ public:
     {
     }
 
+    void AcceptParameters(GameActionParameterVisitor & visitor) override
+    {
+        visitor.Visit("id", _bannerIndex);
+        visitor.Visit("name", _name);
+    }
+
     uint16_t GetActionFlags() const override
     {
         return GameAction::GetActionFlags() | GameActions::Flags::AllowWhilePaused;
diff --git a/src/openrct2/actions/BannerSetStyleAction.hpp b/src/openrct2/actions/BannerSetStyleAction.hpp
index b34dabbd8d..7103804e0c 100644
--- a/src/openrct2/actions/BannerSetStyleAction.hpp
+++ b/src/openrct2/actions/BannerSetStyleAction.hpp
@@ -43,6 +43,13 @@ public:
     {
     }
 
+    void AcceptParameters(GameActionParameterVisitor & visitor) override
+    {
+        visitor.Visit("id", _bannerIndex);
+        visitor.Visit("type", _type);
+        visitor.Visit("parameter", _parameter);
+    }
+
     uint16_t GetActionFlags() const override
     {
         return GameAction::GetActionFlags() | GameActions::Flags::AllowWhilePaused;
diff --git a/src/openrct2/actions/ClimateSetAction.hpp b/src/openrct2/actions/ClimateSetAction.hpp
index 40fbf8dca4..bcee196ad4 100644
--- a/src/openrct2/actions/ClimateSetAction.hpp
+++ b/src/openrct2/actions/ClimateSetAction.hpp
@@ -24,6 +24,11 @@ public:
     {
     }
 
+    void AcceptParameters(GameActionParameterVisitor & visitor) override
+    {
+        visitor.Visit("climate", _climate);
+    }
+
     uint16_t GetActionFlags() const override
     {
         return GameAction::GetActionFlags() | GameActions::Flags::AllowWhilePaused;
diff --git a/src/openrct2/actions/GuestSetFlagsAction.hpp b/src/openrct2/actions/GuestSetFlagsAction.hpp
index 54b169bc4b..4692b7a473 100644
--- a/src/openrct2/actions/GuestSetFlagsAction.hpp
+++ b/src/openrct2/actions/GuestSetFlagsAction.hpp
@@ -33,6 +33,12 @@ public:
         return GameAction::GetActionFlags() | GameActions::Flags::AllowWhilePaused;
     }
 
+    void AcceptParameters(GameActionParameterVisitor & visitor) override
+    {
+        visitor.Visit("peep", _peepId);
+        visitor.Visit("flags", _newFlags);
+    }
+
     void Serialise(DataSerialiser & stream) override
     {
         GameAction::Serialise(stream);
diff --git a/src/openrct2/scripting/ScriptEngine.cpp b/src/openrct2/scripting/ScriptEngine.cpp
index 1abf0bb3de..85db8b1dc5 100644
--- a/src/openrct2/scripting/ScriptEngine.cpp
+++ b/src/openrct2/scripting/ScriptEngine.cpp
@@ -43,7 +43,7 @@
 using namespace OpenRCT2;
 using namespace OpenRCT2::Scripting;
 
-static constexpr int32_t OPENRCT2_PLUGIN_API_VERSION = 12;
+static constexpr int32_t OPENRCT2_PLUGIN_API_VERSION = 13;
 
 struct ExpressionStringifier final
 {