Outcome of simulations for different metallicities and a fixed mass ratio q. Systems marked as Case B/BB or Case AB/ABB have primaries that evolve chemically homogeneously and form BHs, to which the secondary then transfers mass resulting in a ULX. Systems marked in blue have primaries that evolve chemically homogeneously, but have final masses resulting in PISNe. All other systems interact before the formation of a BH and would not form a ULX. See Appendix A for the outcome of all simulations and a detailed description of all outcomes.