[Closed] Gamers, please help dad with no idea

I have just ordered an Xbox one for the kids. No games included (as I used Tesco's vouchers to get it for free). Its just the basic model i.e. no kinect.
So what games should I order to play on Christmas day? I have never been a gamer and have no idea.
I have girls 9&11 plus son 13 (its more for him really). Don't want to ask him and spoil the surprise.

He likes a bit of fantasy adventure, shoot em up type thing (I think). Seems to play something a bit like old skool dungeons and dragons online.

First person shooter: looking at Halo and destiny.

Then there s the Middle Earth game that gets decent reviews.

Was also going to throw in Minecraft for the girls.