In the meta-dynamics approach the energy is augmented by two terms: a term favoring changes in the molecular structure as measured by the change in RMSD from earlier structures in the trajectory and a confining potential. The effect of each term on the dynamics simulations are controlled by several hyperparameters. After finding an optimum set of hyperparameters for reaction discovery, 100 50-ps meta-dynamics simulations identify 31 different reactions, of which all but one have PM3 reaction energies below 30 kcal/mol. Fifteen of the 30 reactions have estimated barrier heights below 50 kcal/mol and subsequent DFT refinement of these yield the three target reactions with barriers below 50 kcal/mol. Seven products are observed that can made from 3-hydroperoxypropanal in one elementary step, and for these reactions there is a good inverse correlation between the barrier and the frequency with which they are observed. The one exception a reaction (R28) where the product consists of three separate molecules, which therefore results in a disproportionate change in RMSD compared to products consisting of one or two molecules thereby favoring the reaction. The remaining products are most likely made from via unstable intermediates that are not minima on the potential energy surface.