Occlude

Here is an excerpt from Occlude's Steam description:

Occlude is an occult game of solitaire stuffed with secrets. Piece together the rules even as they resist your attempts to decipher them.

The game’s not simple. The rules are hidden, and you find them by playing and experimenting. Make sure you have some coins - the coins will show when you’re on the right path. There are seven Rituals, each their own puzzle, increasing in difficulty.

There are seven Entities, and they know you’re playing. Don’t worry about them. Worrying doesn’t do anything. I shouldn’t have mentioned them at all.

• Solitaire: but not as you know it.
• Seven rituals: unlock increasingly complex card puzzles with unique hidden rulesets.
• Two modes: The fiendishly difficult Classic Mode and our new, pleasantly vexing Story Mode with less punishing RNG, a second free cell and unlimited Undo.
• Reality-bending narrative: uncover a cosmic horror story about a world broken by countless attempts to fix it.
• Atmospheric sound design: immersive audio cues that shift based on your closeness to solving each puzzle.
• Secret documents: discover fragments of forbidden texts that provide clues about Occlude's origins.
• Terrible secrets: for those foolish enough to look for them.