Yes, we use BackerKit to collect data on the Kickstarter rewards we need to fill. About two weeks after the campaign closes on October 27, we’ll email you with a link to the BackerKit for this project, and you’ll be able to adjust your pledge then.
In the Kickstarter pledge page, choose “Make a pledge without a reward.” Set your pledge amount to $240 (the cost of the Deluxe Corebook Set add-on). Complete your pledge in the Kickstarter interface. About two weeks after the campaign closes on October 27, we’ll email you with a link to the BackerKit for this project. In BackerKit you’ll be able to select the Deluxe Corebook Set as your backer reward. (You’ll also be able to add to your pledge amount and select other rewards.)
But we’re not making a new edition. We will make limited changes to the way the game plays mechanically—and none of those changes affect the way NPCs, creatures, or items like cyphers or artifacts work. We also won’t be making changes to the setting. So, if you already play Numenera, your bestiaries, adventures, card decks, character portfolios, and books like Into the Night, Technology Compendium, and Jade Colossus will not be affected by these changes. We will not issue any “second editions” of the existing supporting titles—and if you choose not to get Numenera Discovery, future Numenera supplements will work fine with your existing Numenera corebook. Your ongoing campaign will flow smoothly through the change in corebooks. You will even be able to mix existing characters with those from Numenera Discovery into your game. In fact, the game can be played with both the existing corebook and Numenera Discovery in use at the same game table!
(One small exception: Numenera Character Options and Numenera Character Options 2 will remain compatible, but will become substantially less relevant following the improvements to characters in Numenera Discovery. We will retire those titles.)
If you want an add-on, but don't want to back at a backer level—if, for example, you don't want any of the new books, but you really like the Numenera Player's Kit—doing so is easy. Simply pledge the cost of the add-on item (or the total for your add-ons, if you want more than one thing), but don't select any backer level. After the campaign ends we'll ask you what the funds were for, and you'll tell us your add-on choice then.
Don't see the answer to your question? Ask the project creator directly.