Top Descriptors alt Colloquial term for maps which use rhythms that encourage the player to alternate notes. Typically distinct from burst or stream maps. , freeform An unrestrained and loose approach towards visual structure. , variable timing Contains multiple timing points, usually required for songs not recorded to a metronome. , marathon A map with a drain time of over 5 minutes. , progression Contains a gradual advancement in difficulty or concept across the map. , storyboard Contains a storyboard that enhances gameplay experience. , chaotic Unpredictable map design, often testing unusual skillsets. , repetition Features the use of recognizable identical patterns or gameplay elements. , high contrast Uses flashy ideas to follow changes in the music, creating stark differences between different sections of the song. , difficulty spike Contains a sudden and significant increase in challenge within the map's gameplay.