Fly around a deadly central cannon and thread your shots through three spinning rings to crack it open.
A cannon at the center is wrapped in three counter-rotating rings of armor. Pilot your ship around it, time your shots so a gap in all three rings lines up, and punch through to destroy the core while dodging its return fire.
Ring Breaker draws on the barrier shooters of the early 1980s, a small family of arcade games built around a defended centre rather than a defended baseline. The specific cabinet this borrows from has not been confidently identified, so it is described here rather than named.
The arrangement is what makes it interesting. A cannon sits at the middle of the screen inside rotating rings of shielding, and because the shields turn continuously there is no fixed weak point — only a gap that comes around. Shooting the shielding opens a channel that closes again as the ring moves on, so the game is a timing problem disguised as an aiming one, and firing wildly seals the opening you were making.
Ring Breaker is an original free browser arena shooter built around a rotating-ring shield puzzle, with selectable difficulty. Play instantly in your browser.