diff --git a/src/critter.cc b/src/critter.cc
index edfb375..9d98601 100644
--- a/src/critter.cc
+++ b/src/critter.cc
@@ -607,7 +607,8 @@ void _process_rads(Object* obj, int radiationLevel, bool isHealing)
             // You have died from radiation sickness.
             messageListItem.num = 1006;
             if (messageListGetItem(&gMiscMessageList, &messageListItem)) {
-                displayMonitorAddMessage(messageListItem.text);
+                // SFALL: Display a pop-up message box about death from radiation.
+                gameShowDeathDialog(messageListItem.text);
             }
         }
     }
diff --git a/src/game.cc b/src/game.cc
index 38ae806..5368c73 100644
--- a/src/game.cc
+++ b/src/game.cc
@@ -1332,3 +1332,50 @@ static void showSplash()
 
     configSetInt(&gGameConfig, GAME_CONFIG_SYSTEM_KEY, GAME_CONFIG_SPLASH_KEY, splash + 1);
 }
+
+int gameShowDeathDialog(const char* message)
+{
+    bool isoWasEnabled = isoDisable();
+
+    bool gameMouseWasVisible;
+    if (isoWasEnabled) {
+        gameMouseWasVisible = gameMouseObjectsIsVisible();
+    } else {
+        gameMouseWasVisible = false;
+    }
+
+    if (gameMouseWasVisible) {
+        gameMouseObjectsHide();
+    }
+
+    bool cursorWasHidden = cursorIsHidden();
+    if (cursorWasHidden) {
+        mouseShowCursor();
+    }
+
+    int oldCursor = gameMouseGetCursor();
+    gameMouseSetCursor(MOUSE_CURSOR_ARROW);
+
+    int oldUserWantsToQuit = _game_user_wants_to_quit;
+    _game_user_wants_to_quit = 0;
+
+    int rc = showDialogBox(message, 0, 0, 169, 117, _colorTable[32328], NULL, _colorTable[32328], DIALOG_BOX_LARGE);
+
+    _game_user_wants_to_quit = oldUserWantsToQuit;
+
+    gameMouseSetCursor(oldCursor);
+
+    if (cursorWasHidden) {
+        mouseHideCursor();
+    }
+
+    if (gameMouseWasVisible) {
+        gameMouseObjectsShow();
+    }
+
+    if (isoWasEnabled) {
+        isoEnable();
+    }
+
+    return rc;
+}
diff --git a/src/game.h b/src/game.h
index e4301d8..ea6111e 100644
--- a/src/game.h
+++ b/src/game.h
@@ -28,4 +28,6 @@ int _game_state_request(int a1);
 void _game_state_update();
 int showQuitConfirmationDialog();
 
+int gameShowDeathDialog(const char* message);
+
 #endif /* GAME_H */