Four of the Animorphs face off against three Hork-Bajir.
Gameplay in Know the Secret involves the player playing as each of the five Animorphs (before Ax) as they investigate why Yeerk operations have slowed down. In a mix of platforming, puzzles, and problem solving, the player can switch control between four of the Animorphs; Tobias is stuck as a hawk and gives clues to the player. While solving this mystery, the Animorphs have access to a number of different animal morphs they can change into, totaling 20. Using the different morphs and characters effectively is the key to beating the game.