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Organized by Fatbag
Time active June 10, 2011 to Mar 7, 2013
Method Reimplementation
License Client, Server: GNU GPLv3
All else: ISC License
Niotso is a semi-collaborative effort to re-implement the engine used in The Sims Online. Along with Project Dollhouse, it is one of the two current publicly announced efforts to bring back the The Sims Online.

Niotso's aim is to construct a clean and functional game engine for The Sims Online that is as faithful to the original as possible, under the guidance of strict rules that will ensure that the project falls under fair use in all use cases. Cross-platform compatibility for Windows, Mac, and Linux is a requirement for grand release, and iOS and Android versions are to be expected shortly after.


Niotso was forked from TSO Restoration by the programmer Fatbag (then X-Fi6) and rebranded on June 10, 2011, in response to the close-mindedness, personal insults, and "disastrous bipolar issues" inherent in Ghost and Jonathan, the superiors of TSOR, when workload was distributed among the team members. Though official posts were made on TSOR explaining that Fatbag had "given up", this was not the case, and the two projects were now working in competition to restore The Sims Online more time-effectively. When TSOR was shut down on September 18, 2011, Afr0 took over that project under the name Project Dollhouse.

On November 24, 2011, the Niotso codebase switched from Subversion for revision control to Mercurial.

On January 29, 2012, the Niotso codebase switched from a custom makefile build system to cmake, allowing everything to be built with one command.

On February 19, 2012, character animation was completed.

On July 28, 2012, the HIT disassembler was completed.

On October 19, 2012, the Niotso codebase switched from Mercurial to Git. Libraries and compiled binaries were purged from the repository's history and are now instead uploaded to