The Rhythm of Creativity: A Complete Guide to Custom Songs in osu!

For millions of rhythm game enthusiasts worldwide, osu! is more than just a game—it is an endless, ever-expanding canvas of sound and motion. While rhythm games of the past were strictly bound to the tracklists chosen by their developers, osu! shattered that mold by putting the music entirely in the hands of its community.

At the heart of this phenomenon are custom songs, universally known in the community as beatmaps. Whether you want to hit circles to your favorite anime opening, a high-octane electronic track, a classical symphony, or an obscure video game remix, custom songs make it possible.

What Exactly is an osu! “Custom Song”?

In osu!, a custom song isn’t just an audio file playing in the background; it is a fully synchronized, interactive experience called a beatmap.

A single beatmap package (often downloaded as an .osz file) contains everything needed for the experience:

• The Audio File: Usually an MP3 or OGG file of the song.
• The Background Art: High-resolution artwork or imagery that sets the mood.
• Hit Objects: Precisely timed circles, sliders, and spinners placed by community creators (mappers) to match the vocals, beat, and melody.
• Extra Elements (Optional): Custom background videos, storyboards, skins, and hit sounds.

The osu! Beatmap Ecosystem: Ranked, Loved, and Pending

The osu! beatmap database hosts hundreds of thousands of custom songs, categorized to help players find what they are looking for:

| Category | Description |
| :— | :— |
| Ranked & Approved | Maps that meet strict quality, timing, and fairness guidelines. Playing these awards performance points (pp) and contributes to your global rank. |
| Loved | Maps that may not fit strict competitive standards (