Molten sulfides are known to electrochemists for energy storage applications, but remain an understudied medium in which metal electrodeposition reactions can be conducted. Our research group has been investigating such opportunity in the context of novel processes to extract metals from sulfide ores. During those developments, alkaline and alkaline-earth based sulfide electrolytes have been designed and investigated to operate in a broad temperature range. This presentation aims to provide an overview of the performances and challenges of molten metal sulfide electrolytes in the context of the decomposition of metal sulfide compounds, including Cu, Zn, Mo, Re and Ag sulfides. Results obtained using AC voltametry techniques as well as electrolysis experiments will be presented, highlighting the physical and chemical questioning that arise when considering the use of molten sulfides for electrodeposition.