Vanilla? Madder AKA VMD or VMD Sim is a Deus Ex vanilla conversion focused heavily on RPG and roleplay elements, immersive sim gameplay, modernization/QOL, and more. Skill trees, hunger/stress/smell systems, in depth character customization, status effects from foods, and so much more are included. It also boasts the ability to run with almost any mod, and, in the future, will be able to be used as a near-universal starting point for any total conversion. Note: While not beta or demo, the project is in phase 1 of development. The project will reach its ultimate form at phase 4. Even at this relatively early point in its life, it is ready for quite a few hours of gameplay and boasts many fun features. Arguably, it is very much worth at least one try. Or not. You're allowed to dislike it, too.
Coming to a downloads near you. A (less updated) version will also come bundled with VMD 1.75. It'll do for a first time player just wanting to learn where to start.