Keystones: Foundations
Launches 12 November 2026 · PC
Grab, slide, rotate and tumble stone pieces as a little slime in a 3D puzzle game. Match faces, rearrange supports and plan your next foothold across 100 campaign levels, each with five difficulty variants.
Story
Guide a small slime through 3D stone puzzles. Grab and rearrange pieces to cover targets, open gates and find a way forward. A piece's position and orientation can change the route available to you. Grab, slide, rotate and tumble Different pieces let you slide, rotate or tumble them. A turn can swing a long shape into position; a tumble changes which face points down. Your slime moves with the piece, so choose your grip with the next step in mind. Find the right face Colored supports and marked surfaces make orientation part of the puzzle. Tumble a piece to change its bottom face, then work out how to bring the right color or dot pattern into place. Getting the face right can mean rethinking the route. Keep the route open Use pieces as steps or supports, move them aside to make room and return to them when another part of the puzzle is ready. A piece already on its goal can still be useful elsewhere. Plan where your slime can stand, grab and release. Features 100 campaign levels, each with five difficulty variants. Undo recent moves or restart a puzzle to try another approach.
Features
- Single-player
- #category_playable_at_your_own_pace
- Playable without Timed Input
- Family Sharing
Release details
Keystones: Foundations is developed by Cartoon Rocket Games. Keystones: Foundations launches on Thursday, 12 November 2026 on PC. This date comes from Steam and was last checked on 6 November 2026.
Frequently asked questions
When does Keystones: Foundations release?
Keystones: Foundations launches on 12 November 2026.
Which platforms is Keystones: Foundations on?
Keystones: Foundations is on PC.
Who makes Keystones: Foundations?
Keystones: Foundations is developed by Cartoon Rocket Games.