The Octas SRD is the basic rules for playing the game. The files in the SRD section are released under the Open RPG Creative License (ORC):
ORC AxE (Answers and Explanations)
You may freely use the SRD documents and their contents in the creation of your own Octas game materials.
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Note that materials in other sections of the site are not necessarily part of the ORC-licensed material and are licensed separately where explicitly noted in accompanying licensing notes.