Similar to Deus Ex with GMDX (no, the high res textures from one of the mods were atrociously bad with nonsense Hanzi/Kanji everywhere). It expanded the world with little touches here and there making the environment more believable and the game would still run under 64MB video cards at 800x600 with ease once you got 512MB or 768 to run the improved environments. Yes, the game would perfectly launch under 256MB... but, let's get real, 512MB of RAM are the bare minimum to run GMDX at the lowest playable settings (800x600).

The Nameless Mod was a great game yo play too, with tons of details to explore.