9. Chop
Chop revolves around kidnapping a gangster with the help of Franklin's buddy Lamar and his pet dog, Chop, making for one of the most hilarious missions in GTA history. As the slippery perp tries to sneak through a train-yard, you enlist the help of the trusty canine to chase him down, to the point where players can even switch to Chop's first-person-view, and see him attempting to sniff the guy out. Ultimately, Chop gets distracted by another dog he sees, and the two start humping like there's no tomorrow. The hilarity is accentuated by the fact that a) you can watch this unfold in first-person-view and b) Lamar notices that the dog Chop is fornicating with is male. Eventually, Chop gets back on task and tackles the perp to the ground, giving us all a good laugh and making it clear that GTA V is not going to be as serious as its predecessor.