Fallout 3 is an amazing game in its scope and technical achievements. However, the future it portrays is one you're better off not visiting. It's a huge, open-world action RPG with fleshed out characters that all have interesting stories to tell, and it's a world filled with lots to explore and plenty of adventures to be had. However, Fallout 3 is much more gritty, dirty, dark, bleak, violent, and gory than even Mass Effect.