The Eerie valley is a definition of the effect that evokes robots or animations very similar to people on the comfort of an observer. The point here is that when we try to create, for e
xample in the game, the animation of human form can be very badly influenced by the player. This effect is the stronger the more we try to like our creature to the living person. All the discomfort vanishes when we a certain degree of naturality until the Observer accepts what he sees. This is the reason why you might want to consider using in-game characters that are not people, dress them up in armor, or simply not try to create realistic people if you are not sure they will work well on the player.
I was very impressed that BETHESDA had not fully applied to its task in this respect. When I saw the creation of the characters in Fallout 4 simply odechciewało to look. The characters unnaturally gibałyed, did mines, generally behaved unnaturally.
It's just such a short note on my part. This is one aspect that you might want to consider when designing a game.
I also recommend to read more extensive articles on this topic.
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