By Vampire Horde,Shawn Saris,Mike,+7.4k moreupdatedOct 19, 2014The Green Gel you find throughout The Evil Within is used to level up. When at the hospital, you can sit in a chair that allows you to do so. Green Gel is found in various quantities, and killing bosses often rewards large amounts of it.Up Next: WalkthroughPreviousXbox One CheatsNextWalkthroughTop Guide SectionsWalkthroughThe Assignment WalkthroughThe Consequence WalkthroughThe Executioner WalkthroughWas this guide helpful?In This GuideThe Evil WithinTango GameworksOct 14, 2014Related GuidesOverviewWalkthroughThe Assignment WalkthroughThe Consequence Walkthrough