Top Descriptors collab A map with two or more associated mappers. , megacollab A map with 8 or more associated mappers. , marathon A map with a drain time of over 5 minutes. , gungathon A map with a drain time of over 10 minutes. , alt Colloquial term for maps which use rhythms that encourage the player to alternate notes. Typically distinct from burst or stream maps. , tournament custom A custom map for a playing tournament. , progression Contains a gradual advancement in difficulty or concept across the map. , multi-song Contains multiple songs within the audio. , featured artist Features song(s) composed by artists in osu!’s Featured Artist listing , variable timing Contains multiple timing points, usually required for songs not recorded to a metronome.