The bear and bird's original N64 adventure.
I never owned this one back during its time. Yeah, yeah, I'm sure some of you would consider that to be blasphemy, but what can I say? I actually never even heard of it, but this was before the widespread days of the Internet, and I never heard anyone talk about it. It wasn't until I started collecting that I bought this game. I completed it then, but I haven't really played it since that time.