diff --git a/ag/gm/gm_seite.php b/ag/gm/gm_seite.php
index 41bef63..316e4d2 100644
--- a/ag/gm/gm_seite.php
+++ b/ag/gm/gm_seite.php
@@ -28,6 +28,7 @@ include_once(ROOT_PATH.'/include/rassen.inc.php');
 include_once(ROOT_PATH.'/include/user.inc.php');
 include_once(ROOT_PATH.'/include/usergroup.inc.php');
 
+include_once(ROOT_PATH.'/gm/include/arena.inc.php');
 include_once(ROOT_PATH.'/gm/include/attacken.inc.php');
 include_once(ROOT_PATH.'/gm/include/bilderschau.inc.php');
 include_once(ROOT_PATH.'/gm/include/clan.inc.php');
@@ -118,6 +119,7 @@ function displayOptions(){
 	$entries = array("bilder" => "Bilderschau",
 			"faq" => "FAQ bearbeiten",
 			"rassen" => "Rassen bearbeiten",
+			"arena" => "Arena bearbeiten",
 			"attacken" => "Attacken bearbeiten",
 			"attackentypen" => "Attackentypen bearbeiten",
 			"poll" => "Umfragen bearbeiten",
@@ -204,6 +206,8 @@ if(checkLoginData($_SESSION['user'],$_SESSION['password'])){
 		displayRassen($_REQUEST);
 	}	else if($_REQUEST['choose'] == 'geheim'){
 		displayGeheim($_REQUEST);
+	} else if($_REQUEST['choose'] == 'arena') {
+		displayArena($_REQUEST);
 	} else if($_REQUEST['choose'] == 'tournament'){
 		//_POST['name'] anstatt _REQUEST weil schon durch username überschrieben wird
 		displayTournamentMenu($_REQUEST['action'], $_REQUEST['klein'], $_REQUEST['wochen'], $_REQUEST['minlevel'], $_REQUEST['maxlevel'], $_REQUEST['fusion'], $_REQUEST['special'], $_REQUEST['gain'], $_REQUEST['randomize'], $_POST['name'], $_REQUEST['anzahl']);
diff --git a/ag/gm/include/arena.inc.php b/ag/gm/include/arena.inc.php
new file mode 100644
index 0000000..8641081
--- /dev/null
+++ b/ag/gm/include/arena.inc.php
@@ -0,0 +1,117 @@
+<?php
+
+include_once(ROOT_PATH.'/include/defines.inc.php');
+include_once(ROOT_PATH.'/include/designfunctions.inc.php');
+
+defineIfNotDefined('TAX_NOOB_MIN_TAX', 0.5, true);
+defineIfNotDefined('TAX_NOOB_MAX_LEVEL', 10, true);
+defineIfNotDefined('TAX_START_TAX', 0.85, true);
+defineIfNotDefined('TAX_REDUCTION', 0.05, true);
+defineIfNotDefined('TAX_FREE_START', 250000, true);
+defineIfNotDefined('TAX_FREE_X', 50000, true);
+defineIfNotDefined('TAX_FREE_Y', 17500, true);
+
+function displayPercent($value) {
+	return ($value * 100).'%';
+}
+
+function displayArena($request) {
+	if(isset($request['TAX_NOOB_MIN_TAX'])) {
+		$keys = array('TAX_NOOB_MIN_TAX', 'TAX_NOOB_MAX_LEVEL', 'TAX_START_TAX', 'TAX_REDUCTION',
+				'TAX_FREE_START', 'TAX_FREE_X', 'TAX_FREE_Y');
+		foreach($keys as $key) {
+			setDefine($key, $request[$key]);
+		}
+		echo '<a href="">weiter</a>';
+		return;
+	}
+	?>
+		<form action="" method="POST">
+			<input name="choose" value="arena" type="hidden"></input>
+			<table width="100%" border="1">
+				<tr>
+					<th colspan="4">
+						Arena Einstellungsübersicht
+					</th>
+				</tr>
+				<tr>
+					<th align="center" colspan="4">Freibetrag</th>
+				</tr>
+				<tr>
+					<td width="200px">Startwert</td>
+					<td width="100px"><?php echo displayMoney(TAX_FREE_START); ?></td>
+					<td width="100px"><input name="TAX_FREE_START" value="<?php echo TAX_FREE_START; ?>" /></td>
+					<td rowspan="3">
+					<?php
+						for($i=0;$i<=10;$i++) {
+							echo $i.' Finanzberater: '.displayMoney(TAX_FREE_START + TAX_FREE_X * $i + TAX_FREE_Y * $i*$i).'<br>';
+						}
+					?>
+					</td>
+				</tr>
+				<tr>
+					<td>X pro Berater</td>
+					<td><?php echo displayCount(TAX_FREE_X); ?></td>
+					<td width="100px"><input name="TAX_FREE_X" value="<?php echo TAX_FREE_X; ?>" /></td>
+				</tr>
+				<tr>
+					<td>Y pro Berater</td>
+					<td><?php echo displayCount(TAX_FREE_Y); ?></td>
+					<td width="100px"><input name="TAX_FREE_Y" value="<?php echo TAX_FREE_Y; ?>" /></td>
+				</tr>
+				<tr>
+					<th align="center" colspan="4">Steuersatz</th>
+				</tr>
+				<tr>
+					<td>Startwert</td>
+					<td><?php echo displayPercent(TAX_START_TAX); ?></td>
+					<td width="100px"><input name="TAX_START_TAX" value="<?php echo TAX_START_TAX; ?>" /></td>
+					<td rowspan="3">
+					<?php
+						for($i=0;$i<=10;$i++) {
+							echo $i.' Finanzberater: '.displayPercent(TAX_START_TAX - TAX_REDUCTION * $i).'<br>';
+						}
+					?>
+					</td>
+				<tr>
+				</tr>
+					<td>Rabatt pro Berater</td>
+					<td><?php echo displayPercent(TAX_REDUCTION); ?></td>
+					<td width="100px"><input name="TAX_REDUCTION" value="<?php echo TAX_REDUCTION; ?>" /></td>
+				</tr>
+				<tr>
+				
+					<th align="center" colspan="4">Anfängerhilfe</th>
+				</tr>
+				<tr>
+					<td>Mindest Steuer</td>
+					<td><?php echo displayPercent(TAX_NOOB_MIN_TAX); ?></td>
+					<td width="100px"><input name="TAX_NOOB_MIN_TAX" value="<?php echo TAX_NOOB_MIN_TAX; ?>" /></td>
+					<td rowspan="2">
+					<?php
+						for($i=1;$i<=TAX_NOOB_MAX_LEVEL;$i++) {
+							echo $i.' Arena-Level: '.displayPercent(max(TAX_NOOB_MIN_TAX, min(1, $i / TAX_NOOB_MAX_LEVEL))).'<br>';
+						}
+					?>
+					</td>
+				</tr>
+				<tr>
+					<td>Maximales Arenalevel</td>
+					<td><?php echo TAX_NOOB_MAX_LEVEL; ?></td>
+					<td width="100px"><input name="TAX_NOOB_MAX_LEVEL" value="<?php echo TAX_NOOB_MAX_LEVEL; ?>" /></td>
+				</tr>
+				<tr>
+					<th colspan="4">Beispiele</th>
+				</tr>
+				<tr>
+					<td align="center" colspan="4"><input type="submit" value="&Auml;nderungen &uuml;bernehmen" /></td>
+				</tr>
+				<tr>
+					<td colspan="4">
+						<a href="<?php echo $_SERVER['PHP_SELF']; ?>">Zum Hauptmenu</a>
+					</td>
+				</tr>
+			</table>
+		</form>
+<?php 
+}