What the smurf is TWEWY?

I've never played Halo. I've never watched anyone play it either. I've never played Street Fighter, apart from briefly playing Alpha 3 on the PS1 and finding it mediocre. I've never played Zelda, nor have a clue what it's all about, only seen pictures. I've never played the Quake series. Goldeneye. Smash Bros. Anything by Nintendo, actually. I think having played Super Mario DS means I've played everything Nintendo has made in the last 20 years.