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>
    <pageswithprop gpwpcontinue="71" />
  </query-continue>
  <query>
    <pages>
      <page pageid="16" ns="0" title="Combat System" contentmodel="wikitext" pagelanguage="en" touched="2014-03-24T21:03:26Z" lastrevid="8253" counter="220927" length="44476" />
      <page pageid="20" ns="0" title="Forces" contentmodel="wikitext" pagelanguage="en" touched="2013-12-17T22:06:53Z" lastrevid="7803" counter="4518" length="3969" />
      <page pageid="28" ns="0" title="Other Important Items" contentmodel="wikitext" pagelanguage="en" touched="2014-03-31T14:03:06Z" lastrevid="8305" counter="5596" length="4520" />
      <page pageid="33" ns="0" title="Shadow Lords" contentmodel="wikitext" pagelanguage="en" touched="2014-01-18T16:17:05Z" lastrevid="7926" counter="3441" length="2744" />
      <page pageid="37" ns="0" title="Traverse Area" contentmodel="wikitext" pagelanguage="en" touched="2013-12-17T22:06:55Z" lastrevid="2758" counter="3778" length="3217" />
      <page pageid="48" ns="0" title="Espers" contentmodel="wikitext" pagelanguage="en" touched="2013-12-17T22:06:56Z" lastrevid="228" counter="1933" length="2678" />
      <page pageid="53" ns="0" title="Integrated" contentmodel="wikitext" pagelanguage="en" touched="2014-02-16T07:07:43Z" lastrevid="7890" counter="82257" length="124621" />
      <page pageid="63" ns="0" title="Requests" contentmodel="wikitext" pagelanguage="en" touched="2014-03-26T16:59:02Z" lastrevid="8274" counter="3222" length="4206" />
      <page pageid="67" ns="0" title="The Connected Worlds" contentmodel="wikitext" pagelanguage="en" touched="2013-12-17T22:06:59Z" lastrevid="3863" counter="3514" length="4810" />
      <page pageid="68" ns="0" title="Theme" contentmodel="wikitext" pagelanguage="en" touched="2014-03-26T18:18:52Z" lastrevid="8283" counter="25019" length="4381" />
    </pages>
  </query>
</api>