mask or unmask

http://www.todayandtomorrow.net/2009/10/05/valhalla-by-shin-murayama/

Mask, a form of disguise or concealment usually worn over or in front of the face to hide the identity of a person and by its own features to establish another being. This essential characteristic of hiding and revealing personalities or moods is common to all masks. As cultural objects they have been used throughout the world in all periods since the Stone Age and have been as varied in appearance as in their use and symbolism. The morphological elements of the mask are with few exceptions derived from natural forms. Masks with human features are classified as anthropomorphic and those with animal characteristics as theriomorphic

encyclopædia britannica

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mask or unmask – one of the oldest games revamped by 1518&projects, 1 september 2014