Lunacraft - Lunacraft focuses on Endless Creativity and Exploration elements.
OpenTTD - An open-source clone of the classic game ...
Banished - As always, Email support (at) shiningrocksoftware (dot) com if you have any issues. This will likely be the last update of Banished, except for any major bug fixes. The OSX and Linux versions development has stopped, and won't be released.
Game Dev Tycoon - Game Dev Tycoon is an addictive, Strategy, Business Simulation, and Single-player video game developed and published by Greenheart Games.
Ace of Spades: Battle Builder - Say hello to the creative shooter. Create your battleground, destroy it, then create it again.
RollerCoaster Tycoon Classic - Create and run amazing parks on your iPhone or Android.