Kinect Party Games

You have to make sure that you download the Full Game - Kinect Party - Base Game (575.51 MB) and also the unlock key download Kinect Party - Full Unlock (108 KB).

I use Kinect as a mic for Ghosts but it has very big limitations. The Kinect in general has a setting that allows it to pick up your voice and use it as a mic if no mic is plugged in. This works on several games but not Ghosts. Ghosts does not recognize
the Xbones mic and will not try to use it. So you can use the mic to chat, but only if you are in a party. You can host a party switch to game chat and nothing will happen, it will not recognize the mic. But if you stick with party chat in a gamemode that
allows you to play with party chat, then you can chat with your party, but you will never be able to chat with the lobby using the Kinect in Ghosts, at least as of now and the current updates.

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So there you have it, Use the Kinect for friends in a party, but no Kinect for game chat in ghosts. So looking forward to the adapter when it comes out for my headset.

I also couldn't talk to people in game through Kinect while I was wearing my Astro headset, but I was in party chat with my friend i was playing with. The kinect worked for party chat.

I deleted the game and downloaded again, clearing cache of downloads and cache Marketplace, but do not buy full game

It's possible that the license for the game is no longer available which is why you're only able to get the trial version of it on the marketplace.