Deviants in Once Human can be the difference between winning or losing. However, to make the most of their effect, you need to know how to keep them happy, and also what location you can find each of the Deviants in Once Human. All Deviants in Once Human Deviations can be worn in your backpack or employed in your base. They have various effects on everything from sanity to damage output. Each needs to be kept happy in their own way, via various environmental effects. It may seem like a lot of effort to track down the locations of all of these Deviants in Once Human, but they can really boost your character and also make a house a home. This is still a work in progress. There are so many Deviants to find and collect in Once Human, and I am just a man. Just a mortal man. Screenshot: PC Invasion Deviant nameHow to unlockLocationEffectHappinessButterflies EmissaryThe first Deviant given during the intro missions of Once Human.Dayton WetlandsFatal Flaw Auto AttackGreen Light...