Hello and Welcome!
You will need to share some more information with us. From your post I couldn't understand what you are asking.
Did you create your own Dapp/game and want to share it with the community?
In that case you can post it in Project Development, if it is Bitcoin-related (I doubt it is)
https://bitcointalk.org/index.php?board=12.0If you are providing a service and developing games, you can advertise your service on the Services board. Only if the payment is in Bitcoins.
https://bitcointalk.org/index.php?board=52.0If you are having problems with a certain Dapp or game let us know the name of it. That way you can contact the people who are developing it if they have their ANN thread somewhere on the forum.
Give us more detailed info so that someone can point you in the right direction.