My thinking in regards to the humor is that it’s very strongly late 90s/early 00s edge humor. A lot of the game’s humor is based in cute, cartoony characters swearing, drinking, fucking (off-screen), and being maimed and blown up into gruesome chunks of low-poly meat. It’s also very British–Rare is based in the UK, and it really shows through in this game, from the characters’ accents, to the whole game’s plot being kicked off by Conker getting lost while drunkely stumbling home from a pub that wouldn’t be out of place in an English village.
If you’re a fan of, or nostalgic for, the style of edgy shock humor animation from that period–things like classic South Park, Happy Tree Friends, (jfc how do I say this without getting automodded) R-worded Animal Babies, or Scoundrels (a British skit comedy show starring puppet animals), this game will be right up your alley. Even if you’re not, I’d still say to give it a try–underneath the swearing, poop jokes, dated movie references, and low-fidelity gore, it’s still a platformer by Rare while they were at the top of their game.