Nina Detective. Nina has a new job and she is working as a private detective. Help the brave investigator to fight for justice and solve a mysterious case. Select a costume for the undercover mission and find all the hidden objects to gather important information. Finally, dress up for a costume ball to meet your contact and hand over the information – case solved! This game can be played on all devices. Enjoy and have fun in playing this free online mobile dress up game on Round Games. Good luck.