The Konami Code: up, up, down, down, left, right, left, right, B, A.
<a href="https://en.wikipedia.org/wiki/User:Maximile" class="extiw" title="en:User:Maximile">Maximile</a>, <a href="//commons.wikimedia.org/wiki/User:Stannered" title="User:Stannered">Stannered</a>
2007-08-15, 2008-01-30
<span style="border:1px dotted #FC0;padding:0 4px"><a href="https://en.wikipedia.org/wiki/File:Konami_Code.png" class="extiw" title="en:File:Konami Code.png">Konami Code.png</a></span>