Mercenaries 2: World in Flames

Note: This trick only works after you obtain a helicopter pilot and the winch ability. When on a transport or smuggling contract that relies on you not tipping the vehicle and losing the objects inside, summon a helicopter before entering the mission assigned vehicle, as close to the vehicle as possible. Then, enter the mission vehicle. The timer should start. Get back out and take off in your helicopter. Use the winch to grab the mission vehicle and gain as much altitude as possible. If you fly relatively level, you will not lose anything. However even if you bank even slightly to get around obstacles, losses will be minimal as long as you do not actually bank the copter in a hard turn. The vehicle will get tossed about, making the copter harder to fly; but if you travel directly to the drop-off point from the beginning, it will keep its cargo. This helps you avoid nearly all ground forces. All you have to worry about are the anti-air guns and other helicopters. If worst comes to worst, simply drop the vehicle after coming down to about 20 feet or less. You will have already have saved enough time to hijack another helicopter.

You can disguise yourself from the enemy by using their vehicle, but you cover will be blown if you hang around too long, kill enemies using the vehicle armaments, or hit them with the vehicle. However, enemies do not seem to mind being killed after being hit by vehicles hanging from the winch cable of a rapidly descending helicopter or vehicles released from the winch cable to be dropped on their heads from above. Also, enemies do not seem to mind when one of their helicopters arrives and repositions all of the nearby fuel tanks to strategic locations, such as reinforcement bunkers, alarm towers, guard towers, destruction target buildings, enemy armor, etc. Even more, enemies do not seem to mind when the helicopter drops exploding barrels, jeeps, trucks, tanks, etc. down onto the strategically placed fuel tanks. You can perform HVT captures with ease by eliminating the ground personnel from the air, then land and claim your HVT. You can perform target destruction by placing a fuel tank on top of the building, then dropping something explosive on the fuel tank. If you have the time, and like keeping your factions friendly to you, scope out what faction you are going after, get one of their helicopters, and have fun. The only difficult part is finding a fuel tank. Sometimes, you will have access to more than you need and other times you will have to travel far to find one.

Complete the indicated task to unlock the corresponding equipment.

Ambassador gunship: Complete level 3 of the Helicopter Flying mission.
Carpet Bomb: Check Commander Leviathan's job list before the final Allies or China mission. Complete the job to unlock the Carpet Bomb for purchase.
Diplomat heavy tank: Destroy the targeted buildings for the Allied Nations.
MOAB bomb: Complete all HVT missions for the Allied Nations.
Nuclear Bunker Buster: Successfully complete the final contract mission, "Get Solano Part 2" to unlock it for purchase from Eva for $1 million.

Successfully complete all outpost missions before you initiate the final mission in story mode. The outpost missions can no longer be accessed after the game is completed, which will also prevent a faction's shop items from being unlocked.

Go to all the items you want to pick-up that are in range and select them all. Once all items are selected, throw your resource pick-up smoke. The helicopter should pick-up one item, but all other items will disappear letting you know you have them. You may get an error message stating "Unable to at the moment" or something similar, but the items will still be collected.

Park a vehicle outside of a building which you can enter. Enter then exit the building. The vehicle will be repaired with full ammunition.

Equip a sniper rifle and zoom in. While looking through the scope, press [Weapon Change] to switch to your other weapon. You will still be looking through the scope, but will be able to fire your other weapon as if it has your sniper rifle's scope attached to it. You could potentially get more precision out of a weapon such as the pistol.

Complete the following tasks to unlock PlayStation 3 trophy rewards.

Have a sniper rifle in your inventory. While you are using the scope, press D-pad Right to switch weapons. You should have an assault rifle out while having the scoped view.

This is most useful when used with factions who are already hostile (to keep them from shooting you down), but can also be used to keep friendly factions from becoming upset with you. Obtain one of the helicopters used by the faction you want to steal from (or one of its allies), and allow your disguise to finish. Fly to the location of the fuel you want to obtain and lower your winch. Grab the fuel tank and lift off before the enemy soldiers recognize you, then fly to a secure location (either the PMC or a remote, open location). Once out of sight, call Ewan in for the pick-up. Note: Using a heavier helicopter is recommended, as the Rogue and Gunney class choppers are extremely difficult to control when carrying a heavy fuel tank. Also, there are at least half a dozen fuel tanks relatively close to the PMC, most of which are controlled by Universal Petroleum. Spending the fuel for an Ambassador Gunship (an Allied helicopter, who are allies with UP) is well worth it if you are going to use your PMC as a fuel depot.

Use the following trick to steal fuel from a friendly faction without having to worry about affecting their status towards you. Go to an outpost that has fuel tanks and tag them. Then call in Ewan for the extraction. If a soldier happens to call in a report about your hostile act, go inside the outpost to cancel the call. By doing this you will get fuel and the faction will still be friendly with you.

This trick requires a fast vehicle (for example, a sports motorcycle). Find an outpost that has a fuel tank. Look for an easy way out before you attempt to steal the fuel. Once your vehicle is positioned facing the fast exit and after making sure no one sees you, tag the fuel tank and call Ewan for extraction. Run to your vehicle and drive as fast as you can until you are far enough from the place so that no one can report you. Note: This also works with a helicopter as your vehicle when you are in the jungle area, but requires more time because you must wait a few seconds before you can lift off.

Fly a chopper with a winch. Winch a car and throw it on top of other cars to destroy them.