I've been playing The Witness. It's simple. WSAD and the mouse. And shift to run. No picking up objects, no weird math thrown in. It's very basic geometric puzzles.. sculpted into a maddening masterpiece.
It's also beautiful. It is
forty dollars, which is a lot for a single player game, especially a puzzle game! It takes an estimated 80 hours to solve the puzzles (probably less if you're sharp) and the art is just gorgeous. To me, the cost is worth it.
Supports OSX and Windows. No lunix. Sorry.
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