tomshardware[.]com/video-games/retro-gaming/donkey-kong-64-finally-gets-a-fully-native-pc-port-written-in-c-dk64-rekongpiled-brings-ultrawide-support-uncapped-framerates-and-zero-ai-code
A bunch of developers have rebuilt Donkey Kong 64 from scratch for PC, recompiling the original N64 code to C and unlocking a myriad of features that make the game run even better. You just need to provide a ROM, and "DK64: ReKONGpiled" will play it without any emulation overhead, giving you engine-level control of the classic.
I Googled Donkey Kong 64 ROM and saw several free downloads.