They might have been playing some sort of child's game.

Are they playing some sort of game with him?

Maybe he thought we were playing some sort of joke on him.

Was their informant playing some sort of game with them?

I've known that you've been playing some sort of game with these people.

Or they could be playing some sort of deep game that hadn't made itself apparent yet.

They seem to be playing some sort of game.

They're sitting around in a circle and they seem to be playing some sort of game.

I think he'll play some good sort of part in our lives.

God was surely playing some sort of joke on her!