https://www.moddb.com/mods/the-nameless-mod

What is The Nameless Mod? […]
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What is The Nameless Mod?

The Nameless Mod is a period piece of a Matrix-like world that occurs within a forum. The basis of TNM is specifically the forum of www.PlanetDeusEx.com back when GameSpy ran "planets" for popular games. Each forum is influenced by the game it features, so Forum City for PlanetDeusEx looks like assets from DeusEx. Goofy concept to be sure, but a welcome one to make some fun things throughout the game. Red greasels that shoot fire? Why not. Sentient cleaner bot? If that's what you want your avatar to be, sure. A gun that expands the fatness of someone until they explode? Madness, evil science, yeah... that fits.

Every facet of TNM is based on something within Deus Ex, from the conspiracy side of things, strategies you use in Deus Ex, to technical aspects of the game being represented within the world.
What Does 2.0 Mean?

The Nameless Mod 2.0 is a revamp of the original The Nameless Mod from 2009 on the same engine. The 2.0 update aims to update the visuals of the mod. Speaking as the lead level designer on the original team, and now the project leader of the 2.0 project... things get tiring. There was a lot of disconnect due to level designers of varying ability, and a lot of fatigue presented in the maps. 2.0 aims to unify the maps in quality, and add a lot to the gameplay aspect in regard to creating multiple paths where there were none (despite it being Deus Ex), and interesting flare to keep it engaging. As the 2.0 team grew, so did the scope, and it also includes a multitude of bug fixes and quality of life. This primarily consists of:

All 58 levels redesigned to be up to a higher standard
All levels designed with stealth and combat in mind.
Multiple routes and solutions added for every obstacle.
Some levels are more compact but with more material to interact with, leading to approximately 80% less time solely running from point to point in some cases.
Some levels have been expanded to have more memorable sections and gameplay mechanics, including some levels doubling in size.
Improved visual design to have a cohesive vision.
Two brand-new secret levels and one not-so-secret new level to be found.
New side missions integrated into some levels.
Quality of life features from Deus Ex: Revision and Deus Ex: Transcended.
An additional 7 years of bug fixing and refinement.