Chain Reaction Achievement / Trophy - Grand Theft Auto 4 for Xbox 360, PlayStation 3, PC
An easy way to unlock the Chain Reaction achievement/trophy (blow up ten vehicles in ten seconds) is to destroy the cars in the AutoEroticar lot at the west end of Alderney City. First, purchase RPG Launcher and some ammo, and get a bulky vehicle such as the Hunter. When you reach the lot, use your own vehicle to pack the cars outside into a corner of the showroom. With that done, add your vehicle to the bunch and then step outside. Back away from the mass of cars, and fire your RPG Launcher at the center. After the first shot, hit any vehicle that is not yet destroyed. If done correctly, the Chain Reaction achievement/trophy should now be yours.
This video is from our unofficial game guide. You can view the full guide here
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