Update 1.9 is often called the "Golden Age" because it introduced several core mechanics we still use today:

: By downloading, you must confirm that you already own a legal copy of Geometry Dash on Steam.

: This was the first time creators could use songs from Newgrounds instead of just official soundtracks.

: One of the most popular and skill-intensive modes, where you move diagonally up and down.

: Most private servers run their own level leaderboards. You can join the 1.9 GDPS Discord to find help, report bugs, or share your custom levels. Troubleshooting & Performance

Since the standard Steam version is always the latest update, you need to use the 1.9 GDPS to play this specific version.

: Go to the 1.9 GDPS Download Page to find the latest version (currently u9.0.4).

: New block designs allowed creators to give their levels a "3D" aesthetic for the first time.