A storyboard (SB) is a custom-made animated background that accompanies a beatmap, often for decorative and sometimes for gameplay purposes. A storyboard can be comprised of just about anything, but usually they consist of visual effects designed to make a map more aesthetically pleasing and distinctive to users. Storyboards are inspired from the animated backgrounds found in Osu! Tatakae! Ouendan. Like their inspiration, storyboards are able to adjust to the player's performance in the game and display different things depending on how well the player is doing.
Storyboards are stored in beatmap folders as either standalone
.osb files or extensions to the
[Events] section of a
.osu file. Because of this, it's possible to create different storyboards for different maps within a beatmapset.
Storyboards are often very difficult to make and require considerable time and expertise in standard animation and in the creation of graphics. osu! offers a design editor inside of the beatmap editor to aid the creation of storyboards, but most avid storyboard producers opt to instead program via storyboard scripting directly. Many creators choose to write programs in full-featured programming languages to generate storyboards scripts, because complex visual effects can require a great amount of storyboard code to produce.
With the advent of the design editor to create simple graphical effects in beatmaps, the full list of ranked beatmaps with storyboards is rather long. Therefore, this page only lists those beatmaps who have "full" storyboards. If you want more, go to the full maps list.
Other good SB's can be found here.