due to extreme rarity. The Worlds of Ultima series is a spin-off of Ultima VI using the same game engine, following the Avatar's adventures after the game's conclusion: In Worlds of Ultima: The Savage Empire (1990), a failed experiment transports the Avatar to the Valley of Eodon, a jungle world populated by thirteen primitive tribes whom he must unite against a common enemy, the insectoid Myrmidex. Ultima: Worlds of Adventure 2: Martian Dreams (1991) takes place after The Savage Empire and sees the Avatar travel back in time to the Victorian era and eventually land on Mars to rescue humans stranded on it by accident and to restore the native Martian civilization. The third game, Ultima: Worlds of Adventure 3: Arthurian Legends, was planned to be set in the times of King Arthur but was canceled in 1993. The second spin-off series, Ultima Underworld, consisted of three games with a first-person perspective: Set after Ultima VI, Ultima Underworld: The Stygian Abyss (1992) sees the Avatar descending into the Great Stygian Abyss to rescue a Britannian baron's kidnapped daughter and prevent the summoning of a powerful demon. Ultima Underworld II: Labyrinth of Worlds (1993) is set between the two parts of Ultima VII and starts with the Guardian trapping Lord British, the Avatar and his companions within an impenetrable barrier in their castle. To free them, the Avatar has to travel through several parallel universes looking for a way to undo the spell. Underworld Ascendant (2018), the third in the series licensed the lore and characters for the Underworld setting, but did not allow use of the Ultima brand. The Avatar has been transported to the Underworld and works with local factions. A group of volunteer programmers created Ultima V: Lazarus in 2006, a remake of Ultima V using the Dungeon Siege engine. Console games Console versions of Ultima have allowed further exposure to the series, especially in Japan where the games have been bestsellers and were accompanied by several tie-in products including Ultima cartoons and manga. In most cases, gameplay and graphics have been changed significantly. Console ports of computer games Ultima III: Exodus (NES) Ultima: Quest of the Avatar (NES) - Remake: includes plot and gameplay changes. Ultima IV: Quest of the Avatar (Sega Master System) — A faithful port of the original. Only released in Europe and South America. Ultima V: Warriors of Destiny (NES) Ultima VI: The