Oubliette is one of the earliest party-based role-playing games. It is an open-ended hack-and-slash through a multilevel dungeon with a party of 1-6 characters, chosen from possible classes including Fighters, Priests and Thieves. They will gain experience, jewelry and armor as the adventure progresses, but they will also age and may eventually die. Spells are triggered through typing their activation codes. The party can be changed before every trip to the dungeon by dropping off / picking up characters from the local tavern.
Oubliette originated in 1977 as a multi-user dungeon played on mainframe computers of the PLATO system. The game was inspired by Mines of Moria, written around 1974/1975 by Chuck Miller and others. Mines of Moria was a single-player game, but already had the wireframe 3D graphics that are known from Ultima or Wizardry. Together with DND, Mines of Moria was one of the first computer role-playing games ever.