Twelve Tales: Conker 64 (lost early version of "Conker's Bad Fur Day"; late 1990s)
Twelve Tales: Conker 64, also known as Conker's Quest, was the original version of Conker's Bad Fur Day. The game was first announced at E3 1997, and was to be a sequel to the 1997 Game Boy Color game Conker's Pocket Tales. Rare was criticized for making a game so similar to Banjo-Kazooie, another kid-friendly 3D platformer. In response to this, they withdrew the game from release schedules, leaving many with the assumption that it had been cancelled.
Later, in 1999, Rare announced a redesign to appeal to a more mature audience. Although it was disregarded as a joke at the time, the game was finally released as Conker's Bad Fur Day. The final game was released towards the end of the Nintendo 64's lifespan, and thus didn't sell as expected.
Not much about the game was found prior to 2012, at which point a 30-minute gameplay video was uploaded to YouTube. It pictured Conker entering a few zones not seen in the final game, including a gladiator arena, and an Indiana Jones-esque desert area.
Towards the end of the footage, Berri appears as a playable character. Berri would have been able to call monsters to her aid, instead of facing monsters directly. Aside from this recording, Rare revealed several other features, including a 4 player multiplayer mode. There are several other recordings available, but a ROM has not yet surfaced. Beta 64 did a video regarding it, which contained 4 minutes of footage.