Top Descriptors tournament custom A custom map for a playing tournament. , reading Tests a player's reading skill, i.e. patterns that obfuscate note order and/or timing. , overlap reading Contains patterns where overlapped objects make determining note order and/or timing difficult. , collab A map with two or more associated mappers. , storyboard Contains a storyboard that enhances gameplay experience. , gimmick Focused on a single unique design or gameplay idea. , visually dense Contains patterns where the amount of visible notes makes determining note order and/or timing difficult. , perfect stacks Features perfectly overlapped stacked notes using low stack leniency. , marathon A map with a drain time of over 5 minutes. , 2B Includes gameplay elements with two or more objects placed simultaneously. The term originates from a Chinese transliteration of 'idiot'.