Acquired all 46 upgrades through Consumes

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Some humans and infected throughout the game will grant you an upgrade if you consume them. They are marked by a yellow or blue arm icon on your map. If you miss one of these upgrades or kill the host before consuming them, dont worry; they will respawn at another random location.

Note that all upgrades are not available right away. Continue with the story, and youll find more and more throughout the city. While it is possible for humans to have upgrades, it seems more common for Brawlers to carry them. As such, if youre hunting for upgrades late in the game, check the red zone or bases in the Yellow and Green Zones where Blackwatch keeps Brawlers inside cages.