According to ESRB, this game contains: Animated Violence, Mature Sexual Themes, Strong Language
Parents—don't even think about it. The box is CLEARLY marked "mature" and "not for kids," so please believe me when I say that those warnings are there for a reason. If you come away from this review with only one message, let it be that Conker's Bad Fur Day is NOT FOR KIDS AT ALL. The game contains massive amounts of expletives, more toilet humor than is tolerable, several situations heavily weighted with not-so-subtle sexual innuendo and about a MILLION other things that good parents don't want their kids to be subjected to until they're 35. If you are a parent reading this review and you care about what your kids are involved in, do not buy this game for them, period.
Gamers in general will get varying degrees of satisfaction with Conker's Bad Fur Day depending on whether or not they think the game's level of potty humor and penis jokes are funny.
3D platform fans will find the standard Rare platformer with an emphasis on completing objectives, and a more streamlined structure. Some of the goals to complete can be fairly esoteric, and the game can often lead a gamer to wander around the levels looking for things to do, but it's different enough to warrant a look if you're not easily offended.
Fans of juvenile humor will want to buy two copies—one to play and one to place on the shrine they will build to it. While I felt the game's charm was lacking, there seems to be a huge amount of people out there who actually dig this type of material, so if hearing squirrels spout obscenities for no particular reason sounds like a laugh to you, check it out.
Hearing impaired gamers are in luck since the characters speak in comic-book style speech bubbles in addition to the voiceovers. All issues of quality aside, my continued thanks to Rare for making their games accessible.