seeding methods cannot answer research questions pertaining to the nucleation mechanism itself. In order to discover and investigate mechanisms deviating from the one postulated in CNT and its extensions, unseeded nucleation simulations are necessary. In unseeded nucleation simulations, the assembly of crystalline nuclei is explicitly sampled, starting from a solution where a critical nucleus is absent. As such, in unseeded simulations, the mechanism of nucleation is not a priori defined and emerges from the collective evolution of the system, thus allowing for an open-ended exploration of the nucleation process. This can be useful for studying systems that exhibit complex behaviour involving intermediates along the nucleation pathway or that can yield different crystal structures upon nucleation.