The project started in 2014. It passed through the Steam Greenlight programme in 2015 and an early version was made available in 2017.
ProtoMasons was to be retired from the Steam store on the 28th of April 2019 due to lack of resources to continue development. After some surprising requests to offer a final farewell sale, we extended the retirement date for a week during which time the game will be offered at an 80% discount.
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