I don't know what the data-embed-by is either, but it seems like it works without it. So your replacement could be:
Code:
<script type="text/javascript" src="//cdn.playbuzz.com/widget/feed.js"></script>
<div class="pb_feed" data-height="auto" data-game="{param}" data-tags="All" data-recommend="false" data-margin-top="0" data-game-info="true" data-comments="false" data-shares="true" data-key="Default"></div>
and then when you wanted to use it in a post you'd insert something like
Code:
[game]/brittneyk11/what-part-of-a-wolpack-are-you[/game]