In this review redox induced reactions of transition metal vinylidene complexes have been summarized for the first time. Surprisingly there are no reports on metal-centered reactivity of redox-activated vinylidenes so that the prior emphasis is made on ligand-centered reactions (Cβsingle bondCβ dimerizations, cleavage, and formation of Cβsingle bondH bonds etc.). A discussion of redox activation of related transition metal σ-alkynyl and alkylidyne complexes is limited by the cases wherein transition metal vinylidenes are formed at least as intermediates.