Top Descriptors featured artist Features song(s) composed by artists in osu!’s Featured Artist listing , collab A map with two or more associated mappers. , visually dense Contains patterns where the amount of visible notes makes determining note order and/or timing difficult. , freeform An unrestrained and loose approach towards visual structure. , overlap reading Contains patterns where overlapped objects make determining note order and/or timing difficult. , custom song Maps a song made specifically for the map. This includes songs created for a mapping contest which the map participated in. , complex snap divisors Uses mixed or unusual snap divisors in order to test the player's tapping ability.