Difficulty Settings
The key summary provides basic information to proceed through the game, including all collectibles (memos, strange photos, and glimpses of the past) for 100% completion and New Game+ items. The summary also provides quick solutions for all puzzles for all difficulty levels: light, standard, and hard. Items and actions not mandatory for the game's progress are marked in italics.
You can easily skip collecting some key items and entire puzzles if you already know the code. While you can skip collecting maps, it is highly recommended to pick them up for navigation. The complete walkthrough sections provide detailed instructions with locations of all items, including all collectibles, supplies, notes, and additional points of interest, in-depth puzzle solutions for all difficulty levels, and boss fight strategies.
This walkthrough is written for the standard combat difficulty, and the locations of some supply items may differ based on your playthrough style. Both sections will allow you to get all trophies/achievements, though some require multiple playthroughs. After the walkthrough, you can check the detailed requirements to get all eight endings of the game. This walkthrough also includes complete maps with all items and monsters marked for easy reference.