The Overgrowth preorder key page has retired

You no longer need a preorder (SPF) key. The Secret Preorder Forum is open to everyone now, so you can read it directly, and the old alpha download links there work again for every build up to a181.

The key you entered looks like a Humble Bundle key. If you have not claimed it yet, you can open it on Humble:

Open this key on Humble Bundle

• Older builds thread in the Secret Preorder Forum (forum index). Builds after a181 and the first betas are still missing.
• The current release of Overgrowth is available in your Humble Bundle library or on Steam.
• Questions: contact@wolfire.com.