Primal is played from a third person perspective. The game features a mixture of action and combat sequences, where the player has to fight various enemies, or alternatively flee from or chase them, while also heavily relying on exploration and the solving of puzzles to advance through the levels. Levels are designed so that they have to backtracked multiple times, for example when a new core skill or item has been acquired that allows further progression. Each world features a specific demonic transformation that gives Jen skills, allowing her to access areas she previously could not. For instance, the Undine transformation allows Jen to breathe underwater, while the Wraith form provides the ability to slow time. Later worlds require the player to use multiple transformations to progress.[1]
Most of the time, control can be freely switched between Jen and Scree. When in control of one, the other will be operated by an artificial intelligence (AI). During play, the characters can interact with one another, performing actions such as asking questions, or siphoning energy. When in control of Jen, the player may transform into one of four demonic forms that are unlocked over the course of the story, all of which boost her attack and defense and give access to various abilities. Combat was designed specifically so that the forms have to be switched mid-fight, as to use the advantages and specific weaponry of each race.[2] Later in the game, this systems allows for intricate combinations, as each form possesses over 20 different moves.[1] Jen can replenish health by absorbing demonic energy, which Scree can also store.[3] When in control of Scree, the player is invulnerable, as Scree is made out of stone. This allows him to traverse areas Jen cannot, such as lava or poisonous water. Aside from storing energy for Jen, he can revive her should her energy meter reach zero. Additionally, Scree can possess statues for various purposes.[4]