他通过不断改变主意来玩弄心理游戏，试图让我感到困惑。

He's playing a ___mindgame by constantly changing his mind to confuse me.

这场辩论变成了一场心理战，双方都在试图预测对方的下一步行动。

The debate turned into a ___mind game as both sides tried to predict each other's next move.

他们在谈判中玩心理游戏，试图让对方先让步。

They played ___mindgames during the negotiation, trying to make each other give in first.