WalkScape: Grind by walking!
From The Walkscape Walkthrough
WalkScape is a game heavily inspired by the good old ol' RuneScape. But instead of playing actively all the time, you gain progress by walking in real life. It's designed to be non-intrusive, with no predatory monetization practices. By non-intrusive we mean that it will truly let you enjoy your time outside by not constantly requiring your attention. Everything that needs active involvement (like combat or quests) should be done when you get home. The main goal of the game is to make people more interested in walking by giving them an amazing gaming experience to motivate them to keep walking. And you can play it while at work, or when you are walking with friends, and while walking your dog. You can truly focus on what you are doing and do more active playing later.
