• Player agency: The degree to which the engine allows the player to project their imagination onto the game world. Player agency is proportional to how often "can I do this" questions can be answered in the affirmative.
  • Example of low player agency: There is only one type of boat in Minecraft, which can only be crafted with a certain recipe. Questions like "can I add sails to this boat" and "can I fortify the hull of my boat" are answered in the negative.
  • Example of high player agency: boats in Vessels and Valor can be built from scratch using a variety of materials, voxel by voxel, which allows for any type of boat to be built. Questions like "can I add sails to this boat" and "can I fortify the hull of my boat" are answered in the affirmative.