Game development

That Which Sleeps is currently in development by King Dinosaur Games, and is to be launched after a paid beta, with no release date set. A successful Kickstarter in September-October 2014 raised several times its goal in crowdsourced funding, allowing many kinds of new content and a graphical overhaul (but doing no favors for the release date).

Work on the game started in late 2013 and entered feature lock in March 2015, closing the door on new features until after the beta. Outside help has been brought in: As King Dinosaur Games is tiny and has no in-house artist, commissioning art assets was a major goal for the Kickstarter. The game uses the Unity engine. A number of tools are also being developed. Further news and updates are spread across half the Internet.

Release Schedule
Pre-release:
 * Map editor - available as an alpha.
 * Mod tools - poised for release in late April.
 * Scenario editor - not available.
 * Hex editor - not available.
 * Closed beta - not available, and not going to make it in April.

Post-release:
 * Some of the Kickstarter stretch goals are not being developed for inclusion at launch time.

No schedule:
 * Demo - a playable demo was a priority for the developers earlier. It ran into trouble, up to and including being clotheslined by the work that goes into running a Kickstarter.

General

 * That Which Sleeps FAQ
 * Official forums: Mostly used as private forums for backers and beta users, with a small public area.
 * That Which Sleeps subreddit: Small and quiet, succeeded by the forums.
 * This wiki

News and Resources

 * Successful Kickstarter: Actively updated, this is the best place for news outside of the private forums.
 * YouTube channel: Video dev logs and game trailer; the material is also collected on the Videos page.
 * IndieDB entry: Occasionally updated with news and new material.
 * ModDB entry: This and the IndieDB entry are the same thing with different color schemes.
 * Steam Greenlight page: Successfully Greenlit, clearing the way for the game to be sold on Steam. Occasionally updated with news of updates on other sites. Features comments from the developers.
 * TIGForums dev log: Not maintained.

Company and Official Material

 * King Dinosaur Games company website
 * That Which Sleeps Press kit
 * Company Twitter page
 * Company mailing list subscription
 * That Which Sleeps Facebook page
 * That Which Sleeps Google Plus page

Forum Posts
King Dinosaur Games has a habit of popping in on forum discussions about their game, and may answer questions. They've been especially active on two. Call it community outreach. The wiki claims no responsibility for the content of these links, especially the second one.
 * Thread on the Bay 12 Games Forum
 * Thread on RPG Codex

Other Things

 * That Which Sleeps music on SoundCloud
 * Borja Pindado on DeviantArt, an outsourced artist working on the game's graphics.
 * Richard Luong on DeviantArt, ditto.