diff --git a/_DecVer.php b/_DecVer.php
new file mode 100644
index 0000000..5d1e1e0
--- /dev/null
+++ b/_DecVer.php
@@ -0,0 +1,68 @@
+#!/usr/bin/env php
+<?php
+
+/*
+ * DecMcpe
+ *
+ * Copyright (C) 2016 tomocrafter
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author tomocrafter
+ */
+
+$opts = getopt("", ["in:", "out:"]);
+$SUBJECT = $opts["in"] ?? "in/mpe.asm";
+$OUTPUT = $opts["out"] ?? "out/var.json";
+
+/** @noinspection PhpUsageOfSilenceOperatorInspection */
+@mkdir(dirname($OUTPUT), 0777, true);
+
+spl_autoload_register(function ($class){
+	require_once __DIR__ . DIRECTORY_SEPARATOR . str_replace("\\", DIRECTORY_SEPARATOR, $class) . ".php";
+});
+
+$pkColl = new PacketCollection;
+
+$gets = [
+	"NetworkDefaultMaxIncomingConnections",
+	"NetworkDefaultGamePort",
+	"CurrentLevelChunkFormat",
+	"CurrentStorageVersion",
+	"LevelDBCompressorID",
+	"MaxChatLength",
+	"NetworkProtocolVersion",
+	"BetaVersion",
+	"PatchVersion",
+	"MinorVersion",
+	"MajorVersion",
+];
+
+echo "\rOpening stream to read $SUBJECT";
+$is = fopen($SUBJECT, "r");
+$linesCnt = 0;
+$data = [];
+while(!feof($is)){
+	$linesCnt++;
+	echo "\rLine $linesCnt: Reading...";
+	$line = rtrim(fgets($is));
+	if(preg_match("<SharedConstants::([\w]+)>", $line, $match)){
+		if(in_array($match[1], $gets)){
+			echo " Detecting protocol version...";
+			$linesCnt++;
+			$next = trim(fgets($is));
+			if(preg_match('/[0-9a-f]+:[ \t]+([0-9a-f]+)/', $next, $matcha)){
+				$data[$match[1]] = "0x$matcha[1]";
+				echo " Detected 0x$matcha[1]";
+			}
+		}
+	}
+}
+
+echo "\rWriting to $OUTPUT";
+file_put_contents($OUTPUT, json_encode($data, JSON_UNESCAPED_SLASHES | JSON_BIGINT_AS_STRING | JSON_PRETTY_PRINT));
+echo PHP_EOL;
+exit(0);