Top Descriptors repetition Features the use of recognizable identical patterns or gameplay elements. , playfield constraint Restricts object placement to a certain part of the playfield. , video gimmick Employs patterning that closely references the included background video. , gimmick Focused on a single unique design or gameplay idea. , port Originally created for other media and later imported into osu!, usually through using conversion tools. , perfect stacks Features perfectly overlapped stacked notes using low stack leniency. , visually dense Contains patterns where the amount of visible notes makes determining note order and/or timing difficult. , high contrast Uses flashy ideas to follow changes in the music, creating stark differences between different sections of the song. , playfield usage Includes deliberate use of the playfield within the map design. , 2B Includes gameplay elements with two or more objects placed simultaneously. The term originates from a Chinese transliteration of 'idiot'.