(adsbygoogle = window.adsbygoogle || []).push({}); How do you unlock emblems?

For example the emblem merciless in free for all has the following console name I believe:

    emblem_bg_merciless

I tried using the addPlayerStat() function but it didn't work:

    unlockMercilessEmblem(player)

{

	player addPlayerStat("emblem_bg_merciless", 99999999);

}

In the original GSCs I surprisingly didn't find code for unlocking emblems so I'm not sure how it is done.