Pixel Dungeon - Pixel Dungeon is a traditional roguelike game with pixel-art graphics and simple interface.
Moonlighter - Create some headspace & focus on building those ideas
SimCity BuildIt - Build, craft, and control! SimCity BuildIt is an all-new SimCity game designed just for mobile.
Epic Astro Story - Android - $4.99, apple - $3.99 (Free "lite" version available for both)
Hoplite - Hoplite is a Role-playing and Single-player video game developed by Magma Fortress for Mobile Devices.
Soda Dungeon - Soda Dungeon is a Free to play, Adventure-based, Role-playing and Single-player video game developed by AN Productions and published by Armor Games.