Indie puzzle games for adults on Switch offer complex, thought-provoking challenges. 'The Witness' is an open-world puzzle game set on a beautiful island, featuring hundreds of line-drawing puzzles that test logic, pattern recognition, and spatial awareness, with no hand-holding—perfect for critical thinkers. 'Portal 2' is a hilarious and clever puzzle game where you use portal guns to navigate test chambers, with a co-op mode that requires precise communication and teamwork to solve intricate puzzles. 'Monument Valley 2' uses optical illusions and perspective shifts to create mind-bending puzzles, paired with a heartfelt story about a mother and child, blending art and gameplay seamlessly. 'Gorogoa' is a hand-drawn puzzle game where you rearrange panels to tell a narrative, with each puzzle doubling as a piece of the story, offering a unique, immersive experience. 'The Room: Old Sins' is a tactile puzzle game with intricate objects to examine, using touch controls to uncover hidden compartments and solve puzzles, with a dark, mysterious story.