diff --git a/config.cpp b/config.cpp
index b5284063..e924c78b 100644
--- a/config.cpp
+++ b/config.cpp
@@ -22,6 +22,8 @@ EX bool return_false() { return false; }
 
 EX bool use_bool_dialog;
 
+EX bool unlock_all;
+
 /** set to true if a parameter was changed as a consequence of changing linked parameters */
 EX bool linked_consequence;
 
@@ -1777,6 +1779,9 @@ EX void initConfig() {
   param_i(stamplen, "stamplen");
   param_f(anims::period, "animperiod");
 
+  param_b(unlock_all, "unlock_all")
+  -> editable("allow access to all unlockable contant", 'U');
+
   param_b(use_custom_land_list, "customland_use")->be_non_editable();
   for(int i=0; i<landtypes; i++) {
     custom_land_list[i] = true;
diff --git a/geom-exp.cpp b/geom-exp.cpp
index 8234d95d..62c35243 100644
--- a/geom-exp.cpp
+++ b/geom-exp.cpp
@@ -197,7 +197,7 @@ EX void ge_land_selection() {
   
     string s = XLAT1(linf[l].name);
 
-    if(landvisited[l]) {
+    if(landvisited[l] || unlock_all) {
       dialog::addBoolItem(s, l == specialland, dialog::list_fake_key++);
       }
     else {
diff --git a/menus.cpp b/menus.cpp
index ed090b14..567e3826 100644
--- a/menus.cpp
+++ b/menus.cpp
@@ -431,7 +431,7 @@ EX void show_chaos() {
   cmode = sm::SIDE | sm::MAYDARK;
   gamescreen();
   dialog::init(XLAT("land structure"));
-  chaosUnlocked = chaosUnlocked || autocheat;
+  chaosUnlocked = chaosUnlocked || unlock_all || autocheat;
 
   dialog::addHelp(
     XLAT("In the Chaos mode, lands change very often, and "
@@ -804,7 +804,7 @@ EX void showChangeMode() {
 #endif
   dialog::addBoolItem(XLAT("%1 Challenge", moPrincess), (princess::challenge), 'P');
   dialog::add_action_confirmed([] {
-    if(!princess::everSaved && !autocheat)
+    if(!princess::everSaved && !autocheat && !unlock_all)
       addMessage(XLAT("Save %the1 first to unlock this challenge!", moPrincess));
     else restart_game(rg::princess);
     });  
@@ -814,7 +814,7 @@ EX void showChangeMode() {
   dialog::addBoolItem(XLAT("Yendor Challenge"), (yendor::on), 'y');
   dialog::add_action([] {
     clearMessages();
-    if(yendor::everwon || autocheat)
+    if(yendor::everwon || autocheat || unlock_all)
       pushScreen(yendor::showMenu);
     else gotoHelp(yendor::chelp);
     });
diff --git a/yendor.cpp b/yendor.cpp
index 3974a8bc..753a8d5e 100644
--- a/yendor.cpp
+++ b/yendor.cpp
@@ -501,6 +501,7 @@ EX namespace yendor {
     }
   
   bool levelUnlocked(int i) {
+    if(unlock_all) return true;
     yendorlevel& ylev(levels[i]);
 
     eItem t = treasureType(ylev.l);
@@ -763,6 +764,7 @@ EX namespace tactic {
   
   bool tacticUnlocked(eLand l) {
     if(autocheat) return true;
+    if(unlock_all) return true;
     if(l == laWildWest || l == laDual) return true;
     return hiitemsMax(treasureType(l)) * landMultiplier(l) >= 20;
     }