German hard rock veterans SINNER have unveiled their next single, "Leave It All Behind", from their impending farewell studio album, "Boom Bang Goodbye", due July 31, 2026, via Reigning Phoenix Music.

The track starts as a classic power ballad before intensifying into an epic, anthemic refrain.

Mat Sinner explains, "As a child of the '80s, this song fits perfectly into the soundscape I envisioned.

"80s vibes and an ultra-fat, modern sound.

Groovy, driving — it was a blast to make this song." The song features an all-star lineup including Ronnie Romero on vocals, Alex Scholpp, Jim Müller of KISSIN' DYNAMITE, Lisa Müller, Mathias Dieth, Magnus Karlsson with vocals on "Boom Bang Goodbye", and others.

With lyrics reflecting on past times while looking forward, "Leave It All Behind" showcases Ronnie Romero's passionate performance amidst the song's emotive tension.

With "Wait", featuring Michael Bormann on vocals, "Leave It All Behind" offers another glimpse into "Boom Bang Goodbye", marking the end of an extraordinary career after over four decades and 19 studio albums.

SINNER has been a stalwart force in Germany's hard rock and metal scene since 1982, ending their run with this final album featuring an impressive gathering of international hard rock greats.