"Naferia's Reign: Invasion of the Dark Mistress" is a 12-1/2 year long project for the BUILD-engine title "Duke Nukem 3D", though not all of those years had progress due to HDD failures destroying older versions. It is hard to put this mod into anything like a one-line summary, as it can't do the feature list here justice. :P One of the chief features of NR is the RPG-style mechanics mixed with traditional style FPS gaming, such as having improvable stats for Health/Armor/Attack/Defense/Speed, and being able to level up. Other elements include an extended inventory system to carry lots of items. Status buffs/ailments are present as well. But the most important feature of the RPG-style system is by far the multiple-character system. Unlike Hexen and it's ilk where you choose one character to use for the entire game, in NR you find new characters and increase the size of your group and can switch between them at will. (More can be seen in the Description >.>)
After 15 months, a new update to NR is finally here. Due to many things in my life, this took forever to get out, but there are some level of changes to balance and especially the UI.