[Free] The Witness

The Witness – Free on Epic Store from April 4th to April 18th
https://www.epicgames.com/store/en-US/product/the-witness/home

You wake up, alone, on a strange island full of puzzles.

These puzzles will challenge and surprise you.

You don’t remember who you are, and you don’t remember how you got here, but there’s one thing you can do: explore the island in hope of discovering clues, regaining your memory, and somehow finding your way home.

The Witness respects you as an intelligent player and it treats your time as precious. There are over 500 puzzles but no filler; each of the puzzles brings its own new idea into the mix. So, this is a game full of ideas.