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>
    <alllinks galcontinue="Forum" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="Breakthrough" missing="" />
      <page ns="0" title="Breakthrough Demo" missing="" />
      <page ns="0" title="Clan name" missing="" />
      <page ns="0" title="Clan tag" missing="" />
      <page ns="0" title="Demo" missing="" />
      <page ns="0" title="Demota" missing="" />
      <page ns="0" title="Demott" missing="" />
      <page pageid="8" ns="0" title="Clean game from cheats" />
      <page pageid="20" ns="0" title="Configure" />
      <page pageid="12" ns="0" title="Configure MoHAAS.net tool" />
    </pages>
  </query>
</api>