You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allredirects garcontinue="Mages" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1290" ns="0" title="Character biography" />
      <page pageid="1283" ns="0" title="Clan Titan" />
      <page pageid="1312" ns="0" title="Current events" />
      <page pageid="1289" ns="0" title="Curulan Angelicos" />
      <page pageid="1622" ns="0" title="Enchantment" />
      <page pageid="1358" ns="0" title="Guyver" />
      <page pageid="1303" ns="0" title="High Council of Titan" />
      <page pageid="1567" ns="0" title="History of Titan" />
      <page pageid="1338" ns="0" title="Keye J carnelianfire" />
      <page pageid="1315" ns="0" title="Lighthaven" />
    </pages>
  </query>
</api>