Version 4 First Edition
An addendum is available for printed versions before 4.08 and any copy of Companions and Later. It can be downloaded from this link:
Version 4 Second Edition
The Interceptor update introduced a new enemy in the form of Corrupted Sentinels. These live on certain extreme planets which have their own places of interest and rewards. It is now possible to acquire Sentinel Multi-tools offering alternative technologies at Harmonic Camps. Sentinel Interceptor ships are now procedurally generated, so they appearance varies. You can salvage crashed interceptors and add them to your fleet. These ships can hover when inside a planet’s atmosphere. Crashed Interceptors and Harmonic Camps can only be found on planets that host Corrupted Sentinels, which are only located on systems marked as Dissonant on the Galaxy Map.
The other significant change is to starship battles with the Sentinels as it’s now possible to destroy the Sentinel Dreadnought Mothership that appears at level 5. The reward is the location of a Crashed Interceptor.
You can download the new sections added to the second edition of the book here:
Version 4 Third Edition
The following information should be added to page 233 of the 4.12 printing:
To trigger the They Who returned Mission, you need to have completed the whole Artimis mission, Some commentators appear to have instead completed The Atlas Path, but I haven’t tested this. You also need to complete A Trace of Metal, which is triggered early on in The Settlers Mission, unless you are playing on the Switch, which does not implement Settlements and where A Taste of Metal should trigger after 25 warps. You also need to complete A Trace of Metal, which is triggered early on in The Settlers Mission, unless you are playing on the Switch, which does not implement Settlements and where A Taste of Metal should trigger after 25 warps.
After that you need to locate a system with Dissonance from the Galaxy Map and travel there to destroy Dissonance Resonators until you find an Echo Locator. Use the Locator to find a Harmonic Camp and unlock the Harmonic Seal (for this you need to complete a simple maths puzzle but not need to own the Glyphs required). Reportedly the next warp to any new system should trigger the mission, but If it doesn’t, try warping to a Korvax system with Dissonance (that’s what I did).
Echos is a major update introducing a new race of beings and a number of game enhancements. the 4.11 Addnendum gives details of these changes.
Version 4 Fourth Edition
The Omega Update is detailed in the 4.13 errata linked below:
Version 4 Fifth Edition
The Orbital Update is detailed in the 4.18 errata linked below: