The Gunner: Gun Hero

This is a casual, likely portrait-oriented artillery shooter that can be played solo with short, interruptible sessions. While it offers high replay value through an endless mode and frequent updates, monetization can feel pay-to-win, with expensive upgrades and armor that doesn't always provide a significant advantage. It's a good fit for players looking for a mindless, one-handed game to pass the time, especially if they don't mind the potential for pay-to-progress mechanics.