Ultima VI: The False Prophet, released by Origin Systems in 1990, is the sixth part in the role-playing video game series of Ultima. It is the third and final game in the "Age of Enlightenment" trilogy. Ultima VI sees the player return to Britannia, at war with a race of gargoyles from another land, struggling to stop a prophecy from ending their race. The player must help defend Britannia against these gargoyles, and ultimately discover the secrets about both lands and its peoples.

Ultima VI continues to advance the technology of the Ultima series. The game world is larger, with a 1024x1024 tile map seamlessly connected and to scale. World interactivity is further increased with object manipulation, movement, and crafting. Graphics and sound are likewise advanced with the use of new sound card technology and VGA graphics cards, and the user interface is streamlined with the use of point-and-click icons.

Ultima VI was followed by Ultima VII: The Black Gate in 1992.

This game ended the use of multiple scales; in earlier games a town, castle, or dungeon would be represented as a single symbol on the world map, which then expanded into a full sub-map when entering the structure. In Ultima VI, the whole game uses a single scale, with towns and other places seamlessly integrated into the main map; dungeons are now also viewed from the same perspective as the rest of the game, rather than the first-person perspective used by Ultima I-V. The game kept the basic tile system and screen layout of the three preceding parts, but altered the look into a much more colourful and detailed oblique view, to take full advantage of the newly released VGA graphics cards for PCs. Non-player characters had their portraits shown when talked to, something that would not have been feasible on the classic 8-bit Apple II.