The Exorcism of Elings is an augmented reality installation set on the third floor of Elings Hall. Ghosts have possessed some of the objects on the third floor. The player is to investigate the situation and exorcise all of the ghosts from Elings. Once they have found all of the clues, the player will discover the true purpose of the ghosts and their mysterious leader. Through this game, techniques in designing effective augmented reality experiences are demonstrated. The installation focuses on increasing immersion, even on a personal smartphone or tablet. It does this by taking the weaknesses of current augmented reality libraries and integrating them into the game mechanics. By designing the installation around these limitations, the experience seems more engaging and avoids breaking the player's suspension of disbelief.