We're building the game on Unity, so Linux is definitely on the table. Unfortunately, the Linux release will have to come after the PC/Mac release, and it won't be possible for early access.
We'll be releasing digital rights management-free copies with our full release.
All backers will receive the option for a key when H6 enters Steam Early Access, but DRM-free copies will need to wait until full release.
If you've already backed us, go to "Manage Pledge" and add the designated add-on extra pledge cost (or more) to your total. Be sure to keep your original pledge tier the same.
After the Kickstarter is over, we will contact you and you can specify your desired add-ons based on the extra amount added.
Don't see the answer to your question? Ask the project creator directly.