System ||| Void is a rule supplement adaptation of Marc Miller/Steve Jackson Games' Triplanetary for the universe of The Expanse.
This adaptation is not stand-alone. The standard ruleset is required for this to be usable.
SJG's 2018 edition of the game rules is available in PDF form here:
Steve Jackson Games' TRIPLANETARY This webpage also links to a bunch of additional maps, scenarios, alternative rules, and reviews for the classic TRIPLANETARY game.
The material presented here is my original creation, intended for use with the Triplanetary system from Steve Jackson Games. This material is not official and is not endorsed by Steve Jackson Games.
