The rest of the list continued here: * Tropes E-H * Tropes I-L * Tropes M-P * Tropes Q-T * Tropes U-Z * Abusive Precursors: Good God, the Reapers seem to be trying to set the record for most abusive. Hell, Sovereign currently holds the page quote: * The Reapers deliberately left Lost Technology around for future species to find to encourage them to evolve along the lines they want - thus making it easier to completely obliterate them when they return to "Reap" what they have sown. ME2 suggests that they do this to reproduce, humans kidnapped by the Collectors are melted down into organic slush which forms the core of a Reaper. You're not even safe if you don't fit into their designs. The Protheans were unfit to become Reapers, so instead they were kept as slaves