Regular copies of the game are $60, $50 and $40 on PS4, PS3 and Vita respectively, with limited editions upping that by $20 on each platform. For that, your bonuses include an art book, poster and - oh - an "explorer's bag." A Vita tactics-RPG and a backpack is all you really need for a half-decent ramble, right? Perhaps some food and water too, at a stretch.
As for Natural Doctrine itself, NIS America promises challenging turn-based combat across multiple characters in battle, while players can cross-play and cross-save across all three systems. Meanwhile, the story focuses on a group of explorers - ah, that explains the bag - who head underground to mine a rare resource. Things take a turn for the worse when they run into monsters, but luckily they have fantastic shampoo advert hair on their side.