diff --git a/tools/build.gradle b/tools/build.gradle
index 781c80e821..d61e4e01a9 100644
--- a/tools/build.gradle
+++ b/tools/build.gradle
@@ -247,38 +247,38 @@ task pack(dependsOn: [classes, configurations.runtimeClasspath]){
 task genSprites(dependsOn: classes, type: JavaExec){
     finalizedBy 'antialiasGen'
 
-    main = "mindustry.tools.ImagePacker"
+    mainClass = "mindustry.tools.ImagePacker"
     classpath = sourceSets.main.runtimeClasspath
     standardInput = System.in
     workingDir = genFolder
 }
 
-task updateBundles(dependsOn: classes, type: JavaExec){
-    file(genFolder).mkdirs()
-
-    main = "mindustry.tools.BundleLauncher"
-    classpath = sourceSets.main.runtimeClasspath
-    standardInput = System.in
-    workingDir = "../core/assets/bundles/"
-}
-
 task fontgen(dependsOn: classes, type: JavaExec){
-    main = "mindustry.tools.FontGenerator"
+    mainClass = "mindustry.tools.FontGenerator"
     classpath = sourceSets.main.runtimeClasspath
     standardInput = System.in
     workingDir = "../"
 }
 
 task icongen(dependsOn: classes, type: JavaExec){
-    main = "mindustry.tools.IconConverter"
+    mainClass = "mindustry.tools.IconConverter"
     classpath = sourceSets.main.runtimeClasspath
     standardInput = System.in
     workingDir = "../core/assets-raw"
 }
 
 task updateScripts(dependsOn: classes, type: JavaExec){
-    main = "mindustry.tools.ScriptMainGenerator"
+    mainClass = "mindustry.tools.ScriptMainGenerator"
     classpath = sourceSets.main.runtimeClasspath
     standardInput = System.in
     workingDir = "../"
 }
+
+task updateBundles(dependsOn: classes, type: JavaExec){
+    file(genFolder).mkdirs()
+
+    mainClass = "mindustry.tools.BundleLauncher"
+    classpath = sourceSets.main.runtimeClasspath
+    standardInput = System.in
+    workingDir = "../core/assets/bundles/"
+}
\ No newline at end of file
diff --git a/tools/src/mindustry/tools/BundleLauncher.java b/tools/src/mindustry/tools/BundleLauncher.java
index fe1484175a..fe1d5b5980 100644
--- a/tools/src/mindustry/tools/BundleLauncher.java
+++ b/tools/src/mindustry/tools/BundleLauncher.java
@@ -12,19 +12,38 @@ public class BundleLauncher{
         OrderedMap<String, String> base = new OrderedMap<>();
         PropertiesUtils.load(base, Fi.get("bundle.properties").reader());
         Seq<String> removals = new Seq<>();
-        String str = Fi.get("bundle.properties").readString();
-        ObjectSet<String> newlines = Seq.with(str.split("\n")).select(l -> l.contains(" = ") && str.indexOf(l) + l.length() < str.length() - 2 && str.charAt(str.indexOf(l) + l.length() + 1) == '\n').map(l -> l.split(" = ")[0]).asSet();
+
         Fi.get(".").walk(child -> {
-            if(child.name().equals("bundle.properties") || child.toString().contains("output")) return;
+            if(child.name().equals("bundle.properties") || child.toString().contains("output") || !child.name().equals("bundle_ko.properties")) return;
 
             Log.info("Parsing bundle: @", child);
 
             OrderedMap<String, String> other = new OrderedMap<>();
-            PropertiesUtils.load(other, child.reader(2048, "UTF-8"));
+
+            //find the last known comment of each line
+            ObjectMap<String, String> comments = new ObjectMap<>();
+            StringBuilder curComment = new StringBuilder();
+
+            for(String line : Seq.with(child.readString().split("\n", -1))){
+                if(line.startsWith("#") || line.isEmpty()){
+                    curComment.append(line).append("\n");
+                }else if(line.contains("=")){
+                    String lastKey = line.substring(0, line.indexOf("=")).trim();
+                    if(curComment.length() != 0){
+                        comments.put(lastKey, curComment.toString());
+                        curComment.setLength(0);
+                    }
+                }
+            }
+
+            ObjectMap<String, String> extras = new OrderedMap<>();
+            PropertiesUtils.load(other, child.reader());
             removals.clear();
 
             for(String key : other.orderedKeys()){
-                if(!base.containsKey(key)){
+                if(!base.containsKey(key) && key.contains(".details")){
+                    extras.put(key, other.get(key));
+                }else if(!base.containsKey(key)){
                     removals.add(key);
                     Log.info("&lr- Removing unused key '@'...", key);
                 }
@@ -44,7 +63,9 @@ public class BundleLauncher{
                 }
             }
 
-            Func2<String, String, String> processor = (key, value) -> (key + " = " + value).replace("\\", "\\\\").replace("\n", "\\n") + "\n" + (newlines.contains(key) ? "\n" : "");
+            Func2<String, String, String> processor = (key, value) ->
+                (comments.containsKey(key) ? comments.get(key) : "") + //append last known comment if present
+                (key + " =" + (value.trim().isEmpty() ? "" : " ") + uniEscape(value)).replace("\n", "\\n") + "\n";
             Fi output = child.sibling("output/" + child.name());
 
             Log.info("&lc@ keys added.", added);
@@ -52,7 +73,7 @@ public class BundleLauncher{
             StringBuilder result = new StringBuilder();
 
             //add everything ordered
-            for(String key : base.orderedKeys()){
+            for(String key : base.orderedKeys().and(extras.keys().toSeq())){
                 result.append(processor.get(key, other.get(key)));
                 other.remove(key);
             }
@@ -61,4 +82,29 @@ public class BundleLauncher{
         });
     }
 
+    static String uniEscape(String string){
+        StringBuilder outBuffer = new StringBuilder();
+        int len = string.length();
+        for(int i = 0; i < len; i++){
+            char ch = string.charAt(i);
+            if((ch > 61) && (ch < 127)){
+                outBuffer.append(ch == '\\' ? "\\\\" : ch);
+                continue;
+            }
+
+            if(ch >= 0xE000){
+                String hex = Integer.toHexString(ch);
+                outBuffer.append("\\u");
+                for(int j = 0; j < 4 - hex.length(); j++){
+                    outBuffer.append('0');
+                }
+                outBuffer.append(hex);
+            }else{
+                outBuffer.append(ch);
+            }
+        }
+
+        return outBuffer.toString();
+    }
+
 }