The Codex window functions as the in-game encyclopedia. Not all the information is displayed from the beginning; instead, it only displays information for items that have been discovered by the player. It contains three tabs: Inbox, Tutorials, and Recipes.
The recipes tab can be used to view crafting recipes of all currently craftable/buildable items. Only items that can be currently crafted/built are shown (e.g. the recipe for Computers is only shown after unlocking the Tier 5 milestone: Industrial Manufacturing).
- Patch 0.6.0.0: Recipes in the Codex can now be expanded to show the same information that is available in buildings
- Patch 2018-10-11: Made Available