diff --git a/src/data/game.cpp b/src/data/game.cpp
index 0134b688..9d9b4992 100644
--- a/src/data/game.cpp
+++ b/src/data/game.cpp
@@ -54,7 +54,11 @@ IMPLEMENT_REFLECTION(Game) {
 	REFLECT_NO_SCRIPT(card_list_color_script);
 	REFLECT_NO_SCRIPT(statistics_dimensions);
 	REFLECT_NO_SCRIPT(statistics_categories);
+  #if USE_NEW_PACK_SYSTEM
+	REFLECT_ALIAS(307, "pack item", "pack type");
+  #else
 	REFLECT_NO_SCRIPT(pack_items);
+  #endif
 	REFLECT_NO_SCRIPT(pack_types);
 	REFLECT_NO_SCRIPT(keyword_match_script);
 	REFLECT(has_keywords);
diff --git a/src/data/game.hpp b/src/data/game.hpp
index d04b509e..07ca595e 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -14,6 +14,7 @@
 #include <script/scriptable.hpp>
 #include <script/dependency.hpp>
 #include <util/dynamic_arg.hpp>
+#include <data/pack.hpp> // for USE_NEW_PACK_SYSTEM
 
 DECLARE_POINTER_TYPE(Field);
 DECLARE_POINTER_TYPE(Style);
@@ -46,7 +47,9 @@ class Game : public Packaged {
 	OptionalScript          card_list_color_script;	///< Script that determines the color of items in the card list
 	vector<StatsDimensionP> statistics_dimensions;  ///< (Additional) statistics dimensions
 	vector<StatsCategoryP>  statistics_categories;  ///< (Additional) statistics categories
+  #if !USE_NEW_PACK_SYSTEM
 	vector<PackItemP>       pack_items;				///< Types of cards in packs
+  #endif
 	vector<PackTypeP>       pack_types;				///< Types of random card packs to generate
 	vector<WordListP>       word_lists;				///< Word lists for editing with a drop down list
 	vector<AddCardsScriptP> add_cards_scripts;		///< Scripts for adding multiple cards to the set
diff --git a/src/data/pack.cpp b/src/data/pack.cpp
index 453cf0f9..3856a78d 100644
--- a/src/data/pack.cpp
+++ b/src/data/pack.cpp
@@ -187,9 +187,13 @@ IMPLEMENT_REFLECTION(PackType) {
 	REFLECT(items);
 	REFLECT_IF_READING {
 		if (select == SELECT_AUTO) {
-			if (filter) select = SELECT_NO_REPLACE;
+			if (filter)              select = SELECT_NO_REPLACE;
 			else if (!items.empty()) select = SELECT_ALL;
 		}
+		if (indeterminate(selectable)) {
+			if (filter)              selectable = false;
+			else if (!items.empty()) selectable = true;
+		}
 	}
 }
 
@@ -202,7 +206,7 @@ IMPLEMENT_REFLECTION(PackItem) {
 
 PackType::PackType()
 	: enabled(true)
-	, selectable(true)
+	, selectable(indeterminate)
 	, summary(true)
 	, select(SELECT_AUTO)
 {}
diff --git a/src/data/pack.hpp b/src/data/pack.hpp
index a73a8579..c41f892b 100644
--- a/src/data/pack.hpp
+++ b/src/data/pack.hpp
@@ -13,6 +13,7 @@
 #include <util/reflect.hpp>
 #include <script/scriptable.hpp>
 #include <boost/random/mersenne_twister.hpp>
+#include <boost/logic/tribool.hpp>
 
 #define USE_NEW_PACK_SYSTEM 1
 
@@ -135,7 +136,7 @@ class PackType : public IntrusivePtrBase<PackType> {
 	
 	String            name;       ///< Name of this pack
 	Scriptable<bool>  enabled;    ///< Is this pack enabled?
-	bool              selectable; ///< Is this pack listed in the UI?
+	tribool           selectable; ///< Is this pack listed in the UI?
 	bool              summary;    ///< Should the total be listed for this type?
 	PackSelectType    select;     ///< What cards/items to select
 	OptionalScript    filter;     ///< Filter to select this type of cards
diff --git a/src/gui/set/random_pack_panel.cpp b/src/gui/set/random_pack_panel.cpp
index de01100c..3a5158ed 100644
--- a/src/gui/set/random_pack_panel.cpp
+++ b/src/gui/set/random_pack_panel.cpp
@@ -268,7 +268,7 @@ void RandomPackPanel::onChangeSet() {
 	
 	// add pack controls
 	FOR_EACH(pack, set->game->pack_types) {
-	  #if NEW_PACK_SYSTEM
+	  #if USE_NEW_PACK_SYSTEM
 		if (pack->selectable) {
 	  #endif
 			PackItem i;
@@ -278,7 +278,7 @@ void RandomPackPanel::onChangeSet() {
 			packsSizer->Add(i.label, 0, wxALIGN_CENTER_VERTICAL);
 			packsSizer->Add(i.value, 0, wxEXPAND | wxALIGN_CENTER);
 			packs.push_back(i);
-	  #if NEW_PACK_SYSTEM
+	  #if USE_NEW_PACK_SYSTEM
 		}
 	  #endif
 	}
diff --git a/src/util/io/get_member.cpp b/src/util/io/get_member.cpp
index f9fbdace..21a68af5 100644
--- a/src/util/io/get_member.cpp
+++ b/src/util/io/get_member.cpp
@@ -11,6 +11,7 @@
 #include <util/vector2d.hpp>
 #include <script/script.hpp>
 #include <script/to_value.hpp>
+#include <boost/logic/tribool.hpp>
 
 // ---------------------------------------------------------------------------- : GetDefaultMember
 
@@ -21,6 +22,7 @@ template <> void GetDefaultMember::handle(const int&          v) { value = to_sc
 template <> void GetDefaultMember::handle(const unsigned int& v) { value = to_script((int)v); }
 template <> void GetDefaultMember::handle(const double&       v) { value = to_script(v); }
 template <> void GetDefaultMember::handle(const bool&         v) { value = to_script(v); }
+template <> void GetDefaultMember::handle(const tribool&      v) { value = to_script((bool)v); }
 template <> void GetDefaultMember::handle(const Vector2D&     v) { value = to_script(String::Format(_("(%.10lf,%.10lf)"), v.x, v.y)); }
 template <> void GetDefaultMember::handle(const Color&        v) { value = to_script(v); }
             void GetDefaultMember::handle(const ScriptValueP& v) { value = v; }
diff --git a/src/util/io/reader.cpp b/src/util/io/reader.cpp
index bebca61f..84d7acc3 100644
--- a/src/util/io/reader.cpp
+++ b/src/util/io/reader.cpp
@@ -11,6 +11,7 @@
 #include <util/vector2d.hpp>
 #include <util/error.hpp>
 #include <util/io/package_manager.hpp>
+#include <boost/logic/tribool.hpp>
 #undef small
 
 typedef void (*ReaderPragmaHandler)(String&);
@@ -366,6 +367,10 @@ template <> void Reader::handle(bool& b) {
 	const String& v = getValue();
 	b = (v==_("true") || v==_("1") || v==_("yes"));
 }
+template <> void Reader::handle(tribool& b) {
+	const String& v = getValue();
+	b = (v==_("true") || v==_("1") || v==_("yes"));
+}
 // ----------------------------------------------------------------------------- : Handling less basic util types
 
 template <> void Reader::handle(Vector2D& vec) {
diff --git a/src/util/io/writer.cpp b/src/util/io/writer.cpp
index 2e256cb4..e4c19358 100644
--- a/src/util/io/writer.cpp
+++ b/src/util/io/writer.cpp
@@ -12,6 +12,7 @@
 #include <util/error.hpp>
 #include <util/version.hpp>
 #include <util/io/package.hpp>
+#include <boost/logic/tribool.hpp>
 
 // ----------------------------------------------------------------------------- : Writer
 
@@ -104,6 +105,11 @@ template <> void Writer::handle(const double& value) {
 template <> void Writer::handle(const bool& value) {
 	handle(value ? _("true") : _("false"));
 }
+template <> void Writer::handle(const tribool& value) {
+	if (!indeterminate(value)) {
+		handle(value ? _("true") : _("false"));
+	}
+}
 
 // ----------------------------------------------------------------------------- : Handling less basic util types