$("body").on('click', '.clients > .steam', function(event) {
        event.preventDefault();
        $(".game").data("steam").remove();
    });

.minecraft-content,
.origin-content,
.battle-content{

display : none;
}

<div class="clients">
<a href="#steam" class="steam">Steam</a>
<a href="#minecraft" class="minecraft">Minecraft</a>
<a href="#origin" class="origin">Origin</a>
<a href="#battle" class="battle">Battle.net</a>
</div>

<!--gösterilecek/gizlenecek alanlar-->
<div class="mainContent">
<div class="steam-content">
Steam içerik
</div>
<div class="minecraft-content">
minecraft içerik
</div>
<div class="origin-content">
origin içerik
</div>
<div class="battle-content">
battle içerik
</div>
</div>

$('.clients a').click(function(e) {

e.preventDefault();

$('.mainContent > div').hide();
$('.' + $(this).attr('href')).show();
});