Co-op Mode in Lips is designed to more accurately reflect songs that feature multiple vocalists. This gameplay mode enhances the experience by showing the lyrics and melody to all parts, helping turn a singing duo into a professional act.[MICROSOFT]
Kiss is a co-op mode where players need to hit gestures at the same time which causes two on-screen characters to kiss.
Time Bomb is a co-op mode where players need to fill a glass of water by hitting notes and phrases and then dump that glass of water on the lighted fuse with a gesture to stop the bomb from going off.