If you are looking for a fun game with easy gamerscore, do not overlook the Goat Simulator games.
XBLA Fans streamer/writer Memories of Final speed ran the achievements to the Xbox One version of Goat Simulator getting them down to a brisk hour and thirty minutes. With Goat Simulator Mmore Goatz Edition, he took on the challenge of getting these even quicker. Using his guide and route, it is completely possible to finish all the MMO Achievements in under 20 minutes and he himself did it in under 25.
For guides to each individual achievement click one of the below links. We have placed then in the recommended order of completion with time-stamps to the main video.