I Love Hue and I Love Hue Too are both games available for free on IOS and Android, they are good games to play after a long day's work or when you are feeling anxious or stressed. In the game, you line up colored tiles into ordered spectrums, it's a puzzle of perception, not logic.
It offers beautiful visual tranquility and has a lovely soothing soundtrack
Virtual Cottage is a free game on Steam that is made to help people relax and get into a productive state of mind. It's not so much a game as it is a tool that makes getting unpleasant tasks done less stressful and more relaxing. The game plays soothing, Lofi music and rain sounds, so you can enjoy the atmosphere the game provides as you do your work. It sets a timer for the task you are doing so you don't work for too long and reminds you to take breaks and take care of yourself!