In Until You Fall , players take on the role of the last remaining Rune Knight, tasked with defending the fallen civilization of Rokar from a "Calamity".

: Every "run" is procedurally generated with randomized power-ups and enemy configurations. While players lose temporary power-ups upon death, they retain a currency called Aether , which is used between runs to permanently upgrade weapons and unlock new abilities.

: The game features a rhythmic, "instructed" combat system where players must physically move their arms to block incoming attacks, dodge heavy strikes, and perform directional combo swipes to break an enemy's guard.

The 1.0 update transitioned the game from a polish phase into a full retail release, bringing several key additions: