If you haven't put two and two together yet, Macca is the demonic currency in SMT: Devil Survivor 2 Record Breaker, and a vital resource for becoming the high bidder in Demon Auctions. The entire concept of being able to pick up deadly monsters from eBay-style auctions may terrify you, but  trust me, you'll be doing it a lot. See, unlike SMTIV or Persona Q, the only way to get new demons is by... more.