Sorry I am a bit late to the game but here is the solution:
$(document).ready(function(){
$(".gamewrapper").click(function()
{
console.log(this);
$(this).find(".game-name").toggleClass("black");
$(this).find(".game-name-info").toggleClass("expand");
});
});
Since you have multiple gamewrapper classes, you need to reference the 'this' keyword to specify the clicked element, then look for it's children to apply the CSS changes.
More details on the jQuery click event handler here: http://api.jquery.com/click/