Probably the best Companion for SWADE. It have everything that you may need for Science Fiction Campaign. You get a most robust specie creation option. A ton of weapon and gear. Optional rules for Outposts. Huge list of optional setting rules aloes any DM to run everything from grim near-future dystopia, to fantastic space opera. A big part of this book is about different types of vehicles. You can ride anything from hover bike, to space dreadnought, and everything in between (including Power Armors and Walkers for all Mecha fans out there). If you didn't find what you want, you can still make it using vehicles creation system. It is not overly complicated, but huge list of options can be overwhelming. I was peaty surprised to see Powers section getting so much attention. It contains 11 new arcane backgrounds. Most of them feels like they belong rather in Super Powers Companion, but are peaty solid rules wise. In the end we have over 50 pages of sci-fy antagonists. They are solid, but most of them feels peaty generic. There are only 2 downsides. First is lack of any kind of creature generation rules. The second is world maker chapter. It only contains random planet generator and nothing more. Seams like a mist opportunity. Over all I think Science Fiction Companion is really good. It is must have for any GM wanting to make his own sci-fy setting.