What runes are
Runes are travel powers you unlock once and keep forever. Each rune opens a kind of obstacle that was closed before.
One grows a vine you can climb, and another lets you cling to walls. A third throws your head to reach a distant switch.
Where they come from
Runes drop from set places in the world, often tied to a boss or a hidden room. You find each one once.
After that, any run can use it from the start. That is why early exploration pays off later.
Blueprint unlocks
Most gear is unlocked by handing blueprints to the Collector. A blueprint joins future runs only after you bank it.
Some blueprints are rare drops from specific enemies. Others sit behind the runes you earn.
Unlock order
Grab runes when you can reach them, since they widen every route. Blueprint unlocks come second and build your gear pool over time.
Next: Biome routing and How a run works.