Top Descriptors collab A map with two or more associated mappers. , freeform An unrestrained and loose approach towards visual structure. , variable timing Contains multiple timing points, usually required for songs not recorded to a metronome. , alt Colloquial term for maps which use rhythms that encourage the player to alternate notes. Typically distinct from burst or stream maps. , featured artist Features song(s) composed by artists in osu!’s Featured Artist listing