mobile phone version, in which the game can only be played in isometric projection. The player may change the level of difficulty at any time, thereby weakening opponents and increasing the chance of success for particular actions. The screen constantly presents a heads-up display, which provides information about the character's health, magicka, and fatigue, all of which can be increased by leveling up. Health can be restored by spells, potions, or resting; the loss of all health results in death. Magicka enables and is depleted by the use of spells; it is rejuvenated naturally over time, but it can be restored similarly to health. Fatigue affects the character's effectiveness in combat and general efficiency, and can be alleviated by resting, potions, and spells. Throughout the world are a variety of enemies, including standard fantasy monsters such as imps and goblins, and animals such as bears and wolves. Enemies become stronger, and weapons and armor more effective as the player levels up. This game mechanic of level-scaling was incorporated to maintain a constant and moderate aspect of difficulty. However, level-scaling combined with the leveling system has received criticism, as it has the potential to unbalance the game; characters with major skills that increase on an involuntary basis, such as athletics or armor, can find that they level too quickly, making the enemies proportionately harder than intended. Plot Oblivion is set during the Third Era, six years after the events of The Elder Scrolls III: Morrowind, although it is not a direct sequel to it or any other game. The game is set in Cyrodiil—a province of Tamriel, the continent on which all the games in the series have so far taken place. The story begins with the player imprisoned in a cell for an unknown crime. Emperor Uriel Septim VII (Patrick Stewart), accompanied by Imperial bodyguards known as the Blades, arrives in the prison, fleeing from assassins who have murdered the emperor's three sons and are now targeting him. The emperor and the Blades reveal that the player's jail cell contains a secret entrance to a part of the city's sewer that functions as an escape route. Pardoned by the emperor, the player follows the group into the sewer, where they come under attack by assassins. The Blades' captain is cut down during the fighting that ensues. Knowing he is destined to die by the hands of the assassins, Uriel Septim