Monster Sanctuary sends players into an interconnected world where monsters are both companions and tools for exploration. After choosing an ancient spectral familiar, players can collect, hatch, evolve and train creatures while traversing the Sanctuary. Its Metroidvania-inspired setting gives the adventure a focus on exploring expansive lands rather than simply moving between battles.
Monster abilities shape that exploration: creatures can help the player fly, ride and break through obstacles, as well as tackle environmental puzzles and precise platforming. In turn-based strategic combat, the order of attacks and combinations between team members matter, with customizable skill trees letting each monster develop alongside the party. The game also includes online player-versus-player battles, alongside endurance challenges and optional Randomizer, Bravery and Permadeath modes.
Its distinctive design connects creature collection to both movement through the world and tactical team-building, giving players more than one way to engage with its monsters.