Every region is free, in full. Regions are ordered by difficulty rather than gated — play them in whatever order you like, though each one assumes the habits the last one taught.
The unguarded edge of the internet — apps shipped without much thought to who might be reading.
A royal court whose trust relationships are its whole attack surface. Nothing here is broken — it is all working exactly as configured.
Infrastructure floating above the ground truth — one misconfigured permission from disaster.
The lawless frontier where physical hardware meets the network — a device you can telnet into, a firmware image you can pull apart, a radio you can just listen to.