This Cyberpunk 2077 Grenade was created to show the entire game art process. The process includes high poly sub-d modeling, low poly modeling, UV mapping, baking and texturing, and setup in a game engine.
I have also linked the all of the tutorial videos and included a 15 minute time lapse summary of the entire process.
Original concept: https://www.artstation.com/artwork/oAd1wO