
Prior to the release of Sacred East, the release system was changed to be less specific to the original design maps and instead designed around a specific theme. Tamriel Rebuilt was originally divided into 6 map areas of which three have now been released, Telvannis, Antideluvian Secrets and Sacred East.

The project has been going on for many years and has no official end, or completion, date. The aim of the project is to create the rest of the province of Morrowind apart from Vvardenfell and Solstheim which were done in the official game and its expansions. Tamriel Rebuilt is a multi stage project that originally started before the game of Morrowind was even launched, and has therefore been in progress for over ten years so far. The game of Morrowind and both the Tribunal and Bloodmoon expansions are needed in order to play this mod. The island of Solstheim, from the Bloodmoon expansion, is more influenced by the province (not the game) of Skyrim than that of Morrowind although it is part of the game and is located just off the north-western coast of the island of Vvardenfell. The aim of the Tamriel Rebuilt mod is to recreate the province of Morrowind in its entirety, not just the island of Vvardenfell, as seen in the official game, and the capital of Mournhold from the Tribunal expansion. Morrowind, and later games in the Elder Scrolls series, are specifically designed to make the creation of user mods much easier by providing toolkits designed to create, organise and publish them. Mods, or modifications, are additions to games that can vary from simple reskins (changing colours and patterns for example) of existing objects to mods that rival the complexity and size of the original game itself. Tamriel Rebuilt is a massive user created mod, or plug-in, for the Bethesda Softworks video game The Elder Scrolls III: Morrowind.
