Is the Many Worlds Interpretation deterministic? Considering that you can determine all of the possible outcomes of a wavefunction (pretty much impossible but still), the only random thing that remains is in what version of the universe you will proceed.
As WillO has pointed out, the many worlds interpretation is deterministic. This follows from the fact that the MWI requires that the unitary evolution of the wavefunction is never violated. since unitary evolution is deterministic, MWI must also be deterministic.