Ultima Underworld - The Stygian Abyss

Ultima Underworld: The Stygian Abyss brings a pioneering PC dungeon crawler to the PlayStation years after its original release, still remarkable for how early it combined free first-person movement, a fully three-dimensional dungeon and systemic interactions between light, sound and enemy behaviour. You descend through a massive, interconnected cave system beneath Britannia, solving puzzles that lean on physics and environmental logic rather than scripted triggers. Its influence on later immersive sims is hard to overstate.