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. , mapping contest An entry for a mapping contest. , progression Contains a gradual advancement in difficulty or concept across the map. , tech Tests uncommon skills. , slider tech Tests uncommon skills involving sliders, such as heavy use of kicksliders or aim on complex slidershapes. , slidershapes Uses a large variety of slider designs. , slider animation Succession of sliders as individual frames to create the illusion of fluid motion. , complex sv Features large changes in slider velocity. , difficulty spike Contains a sudden and significant increase in challenge within the map's gameplay.