Eldritch is a first-person action roguelike that combines immersive sim gameplay with a dark atmosphere inspired by the works of H. P. Lovecraft. Explore mysterious and randomly generated dungeons, uncover ancient secrets, and search for a way to escape while facing dangerous creatures and unexpected challenges. Sneak past enemies, fight your way through the depths, and use mystical powers, weapons, and tools to develop your own play style. Each adventure is different thanks to procedurally generated levels, while unlockable shortcuts allow you to quickly reach deeper parts of the dungeons. The game also includes the free Mountains of Madness expansion, adding a 10-story dungeon beneath the Antarctic mountains, new monsters, weapons, powers, tools, and terrifying secrets to discover.