3. Nervous Ron
One of the craziest and most diverse missions in the game (up to this point) has Trevor teaming up with Nervous Ron to take down a rival drug outfit. After stopping by Ammu-Nation and picking up a sniper rifle, you have to play spotter to Ron as he checks out the operation, in what feels like nothing less than a vintage GTA mission. After sniping as many enemies as possible - and in one spectacular moment, even downing a helicopter - it's time to head into the fray up-close, making good use of Trevor's special ability to wreak havoc. Once this is done, you'll be able to cling to the wing of an aircraft piloted by Ron, shooting more assailants who show up, before breaking off to fly your own aircraft. You'll need to shake off one persistent gangster who just won't say no (clinging fiercely to the wing), and also you'll need to stay low when flying near the military base to avoid detection by radar. This will be for most their first major attempt at flying in the game, and I advise not trying to fly under the bridges until you're used to the controls!