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"?>
    <allredirects garcontinue="Fire_Prism" />
      <page pageid="1102" ns="0" title="Bandit Scimitar" />
      <page pageid="871" ns="0" title="Biskalane Desert" />
      <page pageid="1101" ns="0" title="Blood Maul" />
      <page pageid="1137" ns="0" title="Chess Board" />
      <page pageid="1134" ns="0" title="Chunk of elemental corruption" />
      <page pageid="1176" ns="0" title="Chunk of elemental purity" />
      <page pageid="208" ns="0" title="Console Adding NPC Speech" />
      <page pageid="1167" ns="0" title="Death Prism" />
      <page pageid="198" ns="0" title="Design and Development Process" />
      <page pageid="1130" ns="0" title="Diseased tree" />