Moonlighter - Create some headspace & focus on building those ideas
OpenTTD - An open-source clone of the classic game ...
Epic Astro Story - Android - $4.99, apple - $3.99 (Free "lite" version available for both)
Game Dev Tycoon - Game Dev Tycoon is an addictive, Strategy, Business Simulation, and Single-player video game developed and published by Greenheart Games.
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.
RollerCoaster Tycoon Classic - Create and run amazing parks on your iPhone or Android.