"To break the mould" means to do something in a new or different way, not following the usual or expected patterns or norms. It means stepping out of the ordinary to bring about change or innovation. Full definition
The main points that everyone sitting in on the panel took away was «persistence» and breaking the mould of conventional journalism. (nonfictiongaming.com)
I know quiet people, myself included, who seem to break the mould in surprising ways by being good at public speaking or live performance. (creativeboom.com)
Sure, it's not breaking the mould anymore, but it should be a fun shooter, especially in co-op. (techradar.com)