Despite their best efforts, PlatinumGames was in a bit of a rough spot before the release of NeiR: Automata earlier in the year. Recently, head honcho Hideki Kamiya publicly thanked the developer of the popular sequel, Yoko Taro, for his work, mentioning how the universal acclaim of the title helped secure the company after the cancellation of Scalebound.
With Taro's recent masterpiece back in people's minds after its release several months ago, it's time help those who're still plugging along at ridding Earth from the machine menance, or dishing out some farm tecniques for those looking to jump back in.
One of the bigger achievements/trophies of NieR: Automata is locked out unless a player finds the many in-game weapons. Though plenty of these upgradable machine cutters are borderline useless, the Virtuous line of equipment is particularly potent. And with each weapon being upgradable numerous times, materials can start to enter short supply. When beefing up NieR: Automata's 'Virtuous' weapon set, you're likely going to need a good amount of 'Dented Plate'.
Farming the Dented Plate isn't such a trial task due to their farily generous drop rate from some of the most common Machine lifeforms - namely the 'Small Stubby' and 'Small Flying' - the tiny hopping ones, and the version in the small floating bucket. Though their drop rates aren't too fantastic on your first playthrough, you'll notice them ramp up during Ending B and onward. If you're not willing to wait that long for your Dented Plate fix, however, many forum goers have found the City Ruins getting swarmed with these low-level machines shortly after the Amusment Park boss. Zone variations of these enemies count too.
Remember, reloading a save game will respawn enemies. So save your game, wipe out all the nearby Small Stubby and Small Flyer machines, save again and reload. That's better than running around the entire game looking for more.