Spatial
Last is a spatial user interface. This refers to the use of elements in the game world that are only intended for the player to see but are not real-life objects or meant for the AI to see. Back to our example of the driving game: a trail to guide the player in the direction they were to travel would be an example of a spatial UI. While it is in the game, it serves no purpose other than to guide the player.
All of these can be used separately or even together to make a unique experience for the end user. Remember that the information should be easily accessible and not confusing, and it should help or guide the player without interfering with their progress.
Our game will use a non-diegetic interface to keep things simple. But think of ...
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