[3] For instance, in the beginning of the game, by pressing the B button on the first pad he encounters, Conker drinks some Alka-Seltzer to wipe out his hangover, at which point players can proceed forward.

[11] Windy is the game's main hub with entrances to most other sections: the farm Barn Boys, the poo-filled Sloprano, Heist, the horror-themed Spooky, Bats Tower, and It's War.

[21] Meanwhile, the Panther King, ruler of the land that Conker is lost in, finds that his throne's side table is missing one of its legs and orders his servant, Professor Von Kriplespac, to solve the problem.

This leads him to embroil himself in a series of increasingly absurd and often dangerous situations, including having to recover a beehive from enormous wasps; confronting a giant opera-singing pile of feces called The Great Mighty Poo; being tasked by Don Weaso, the head of the Weasel Mafia, to bomb an entire village of cavemen; being transformed into a bat by his vampiric ancestor Count Batula; and getting drafted into a war between grey squirrels and a Nazi-like group of teddy bears known as the Tediz, which Conker ultimately destroys.

[24] Conker opens an airlock, expelling Kriplespac and the Panther King and Berri's corpses into space, and then battles Heinrich with the aid of a robotic suit.

Following the success of Nintendo's Super Mario 64 (1996), a "barn" at Rare began conceiving and designing a similar unnamed "generic 3D platform adventure" during development of Killer Instinct Gold (1996).

[34] Both then-upcoming Rare titles were first announced at the Electronic Entertainment Expo in June 1997, receiving the names Banjo-Kazooie and Conker's Quest,[35][36] the first two games presented by Nintendo at the event.

[35] A writer for Ultra Game Players also noted it looking similar to Banjo and summarised that "Conker has to collect nuts, find new power-ups (in the form of different hats - kind of like Wario Land) and generally negotiate colorful 3D landscapes".

[37] He called its gameplay "competent and even addictive" and praised the visuals for "upping the ante on [Rare's] previous efforts, where the clipping is better, the textures more varied and the overall look of the game is expansive and colorful".

[44] Coverage was not without criticisms, however; McDermott disliked its "Americanized" writing that consisted of "colonial-style comments" and the "infuriatingly happy music", while Next Generation called its premise of a squirrel collecting acorns in "stunningly unimaginative forests" a rip-off of Ocean Software's 16-bit platform game Mr. Nutz (1993).

[53] Additionally, the market for Mario 64-style platformers was saturated,[54] and another game of that caliber developed by Rare, Banjo-Kazooie, was already completed and released to critical and commercial success.

[67][68] All of Conker's Bad Fur Day's staff, including the animators,[69] programmers,[70] and writers, worked in a liberated, non-planned, and intuition-based manner; the cutscene dialogue and gameplay design in particular was spontaneously conceived between the developers with a rough notion of the level's story.

[77] Seavor's focus on the game, as project lead, was making sure the narrative complemented the gameplay and mechanics: "Just doing a 'thing' like hitting something with a brick is far more engaging if there's a motivation behind it to disguise the binary nature of the act".

[78] For example, the developers originally planned Conker to attack with a baseball bat; this was changed to a frying pan because it justified the use of a comic sound effect of a metal object hitting something.

[87] Burt, a metal box in the "Barn Boys" chapter that stands in place for most of the level, is only there to open a gate, which pokes fun at characters in other games only there to be communicated with for the player to achieve other tasks.

[107] When it came to animation, small details were a priority, such as the Fire Imps reacting if a swear word was entered into the cheat code menu and the camera shaking and triggering a sound effect if hit by an object.

[126] Seavor and Beanland had difficulty coming up with voices for the Ugas; they initially tried to make them sound like the cavemen in At the Earth's Core (1976), but were unsuccessful and ultimately decided to do random grunts and fast word sayings.

[132] Although Seavor remarked that "pretty much 99.9% of the game content remained" writing-wise,[54] Conker's Bad Fur Day was around 20% longer than the final product when it came to planned gameplay designs and concepts, with material cut due to a lack of time to incorporate it.

This demographic change was due to the success of adult-oriented PlayStation franchises like Tomb Raider and Resident Evil, and it meant it would not be enough for Nintendo to compete with Sony entirely on children's properties.

[159] Potential reasons included its prohibitively high cost, advertisements exclusive to the older audience, and release near the end of the Nintendo 64's commercial life.

[166] Claimed IGN editor Matt Casamassina in his 9.9/10 review, "not only is it quite possibly the most hilarious title ever created, but the selection of crude jokes, over-the-top violence and sexual content featured is only one-upped by the game's remarkably deep, well-paced level design, tightly knitted control mechanics, beautiful graphics and amazing sound quality.

[173] Official Nintendo Magazine described even the gross-out levels as "drop dead gorgeous", and exclaimed the "amazing detail on the brilliant film spoof stages take our beloved N64 to new heights of visual pleasure".

[147] Most reviewers agreed the jokes were clever, funny, and well-delivered,[2][21][172] and GamePro felt the "wildly diverse" weird missions were "sublime satirical genius" making up for the linear gameplay.

[178][179][172] Seth Stevenson of Slate magazine called it an example of the lack of actual "mature" console games for "socially adjusted, non-outcasted adults who enjoy videogames".

[172][161][21][87] N64 Magazine felt that camera system does not allow players to properly judge their position within their surroundings[161] and GameSpot remarked that it can get caught on objects or refuse to obey commands.

[21] The San Francisco Chronicle reported the camera being occasionally immovable and getting into frame objects that block the player's view, making worse an experience where the character is "difficult to control, especially when required to jump onto small areas".

Thrown into prison, Conker is faced with the prospect of execution and the game starts with his escape, ball and chain attached, from the Castle's highest tower".

[201][202] Developers noted that it was difficult to port the game to the Xbox system because Bad Fur Day's microcoded performance optimisations had been deeply customised for the Nintendo 64 hardware.

The campaign, titled Conker's Big Reunion, is set ten years after the events of Bad Fur Day and Seavor reprised his voice roles.

[207] Conker's Bad Fur Day is also included as part of the Rare Replay compilation for Xbox One, marking the original game's first official re-release.