Silent clubstep is a 1.8/1.9/2.1 former impossible solo Extreme Demon created, hack-verified, and published by Sailent. It is one of the most famous levels in Geometry Dash history due to the old version of it being previously deemed humanly impossible by many players. The original version was widely considered impossible for many reasons. In 2020, Silent clubstep was updated, nerfing many difficult timings and bug-fixing gameplay segments that broke due to Update 2.1's physics.