diff --git a/Assets/Scripts/GameInitializer.cs b/Assets/Scripts/GameInitializer.cs
index 998687462..ff110493e 100644
--- a/Assets/Scripts/GameInitializer.cs
+++ b/Assets/Scripts/GameInitializer.cs
@@ -55,7 +55,7 @@ namespace HeavenStudio
             {
                 if (editorGO == null && OpeningManager.OnOpenFile.IndexOfAny(Path.GetInvalidPathChars()) == -1)
                 {
-                    if (File.Exists(OpeningManager.OnOpenFile))
+                    if (File.Exists(OpeningManager.OnOpenFile) && Path.GetExtension(OpeningManager.OnOpenFile) == ".riq")
                     {
                         input = OpeningManager.OnOpenFile;
                         fromCmd = true;
diff --git a/Assets/Scripts/GameManager.cs b/Assets/Scripts/GameManager.cs
index 03ea53f4f..4111f2cae 100644
--- a/Assets/Scripts/GameManager.cs
+++ b/Assets/Scripts/GameManager.cs
@@ -6,8 +6,7 @@ using UnityEngine;
 
 using Starpelly;
 using Jukebox;
-using Jukebox.Legacy;
-using Newtonsoft.Json;
+using HeavenStudio.Util;
 using HeavenStudio.Games;
 using HeavenStudio.Common;
 
@@ -237,6 +236,15 @@ namespace HeavenStudio
             {
                 SetGame("noGame");
             }
+
+            if (editor)
+            {
+                Debug.Log(Beatmap.data.riqOrigin);
+                if (Beatmap.data.riqOrigin != "HeavenStudio")
+                {
+                    GlobalGameManager.ShowErrorMessage("Warning", "This chart was made for another game,\nand thus may not be playable in Heaven Studio.\n<color=\"yellow\">You may be able to edit this chart in Heaven Studio to be used in its original game.</color>\n\n<alpha=#AA>Chart Origin: " + Beatmap.data.riqOrigin.DisplayName());
+                }
+            }
         }
 
         public void ScoreInputAccuracy(double accuracy, bool late, double time, double weight = 1, bool doDisplay = true)
diff --git a/Assets/Scripts/LevelEditor/Editor.cs b/Assets/Scripts/LevelEditor/Editor.cs
index 072f9a782..c67e98714 100644
--- a/Assets/Scripts/LevelEditor/Editor.cs
+++ b/Assets/Scripts/LevelEditor/Editor.cs
@@ -386,9 +386,7 @@ namespace HeavenStudio.Editor
         {
             var extensions = new[]
             {
-                new ExtensionFilter("All Supported Files ", new string[] { "riq", "tengoku", "rhmania" }),
                 new ExtensionFilter("Heaven Studio Remix File ", new string[] { "riq" }),
-                new ExtensionFilter("Legacy Heaven Studio Remix ", new string[] { "tengoku", "rhmania" })
             };
 
             StandaloneFileBrowser.OpenFilePanelAsync("Open Remix", "", extensions, false, (string[] paths) =>
diff --git a/Assets/Scripts/Minigames.cs b/Assets/Scripts/Minigames.cs
index 3006fe06f..3637ff8ff 100644
--- a/Assets/Scripts/Minigames.cs
+++ b/Assets/Scripts/Minigames.cs
@@ -170,15 +170,13 @@ namespace HeavenStudio
                         if (item.Key == "track")
                             continue;
                         if (item.Value == null) 
-                        {
-                            e[item.Key] = 0;
-                        }
+                            continue;
                         var value = item.Value;
                         if (value.GetType() == typeof(long))
                             value = new EntityTypes.Integer(int.MinValue, int.MaxValue, (int)value);
                         else if (value.GetType() == typeof(double))
                             value = new EntityTypes.Float(float.NegativeInfinity, float.PositiveInfinity, (float)value);
-                        parameters.Add(new Minigames.Param(item.Key, value, item.Key, "[inferred from remix.json]"));
+                        parameters.Add(new Minigames.Param(item.Key, value, item.Key.DisplayName(), "[inferred from remix.json]"));
                     }
                     action = new Minigames.GameAction(actionName, actionName.DisplayName(), e.length, true, parameters);
                     game.actions.Add(action);
diff --git a/Packages/packages-lock.json b/Packages/packages-lock.json
index de7ccdd01..cfc095163 100644
--- a/Packages/packages-lock.json
+++ b/Packages/packages-lock.json
@@ -7,7 +7,7 @@
       "dependencies": {
         "com.unity.nuget.newtonsoft-json": "3.2.1"
       },
-      "hash": "619442ba26163fb6a00dd50ba52e2fdeaea33e37"
+      "hash": "769b4fe2c85792b34defb00e051e823442b78564"
     },
     "com.unity.2d.sprite": {
       "version": "1.0.0",