Shadow Tactics and Shadow Gambit are two brilliant gems that come to mind by Mimimi Studios. I discovered them a few weeks ago and just learned they went defunct back in August because they were too niche a genre and couldn’t make enough sales. They’re Stealth Strategy games where you control a group of ninjas/pirates through a heavily guarded level to the objective, stealthily murdering everyone along the way. If you get seen you can easily jump back to a quick save and try again. You’re not overpowered and can easily be killed by enemies so save scumming is deliberately built in to the experience to experiment with your approach.