Get 5 Slam Takedowns while driving with the 'Movie Fan' License Plate (Multiplayer)
Unlocking the License Plate
The 'Movie Fan' license plate is earned by unlocking all the basic mods for each of the Movie Legend vehicles, excluding the 3 new mods (Ram Chassis, Drift Tires, Jump Nitrous).
This can be a bit of a grind because it involves driving 200 miles in each car. All mods can be unlocked in a private multiplayer game by yourself, with the exception of Impact Protection, which requires 10 takedowns.
An easy method for accumulating 200 miles is to drive off a cliff. In some areas, your car respawns facing the cliff and cause you to roll off the cliff repeatedly, allowing you to increase driving distance while you're away from the game. Rubber banding the controller isn't required, but can make it slightly faster. It takes about 4 hours to accumulate 200 miles this way.
Keep in mind that the game rarely auto-saves while playing a multiplayer game on your own. Be sure to quit to single player and wait to see the auto-save icon before you turn off your console so progress won't be lost.
Once the 'Movie Fan' plate is unlocked, equip it and score 5 slam takedowns. A slam takedown is when you hit another player and cause them to wreck into a wall or other object. Do this 5 times to unlock the achievement.
This achievement is a bit glitchy and doesn't unlock after scoring 5 slam takedowns. I'm not sure of the specifics, but what's working for most people is using the Shelby GT500 and scoring 5 slam takedowns in a row without wrecking.
Unlocking the cars for Multiplayer
Aston Martin DB5 - Available from start
Dodge Charger R/T - Complete 6 SpeedList events in the DB5
Pontiac Firebird - Complete 6 SpeedList events in the Charger
Aston Martin DBS - Complete 6 SpeedList events in the Firebird
Shelby GT500 - Complete 6 SpeedList events in the DBS
Aston Martin DB5 is immediately available, and the other 4 cars are unlocked by completing 6 SpeedList events using the previously unlocked car. Winning is not required, and can be done in public or private games.
If you're doing it in a Friend game, a quick method is to create a custom Speedlist and selecting the "Arch Angels" challenge 5 times. It's a Park Up event, and it takes place the same place as the meetup. Because of this, you can sit in one spot the entire Speedlist and complete all 5 events without any effort. The event takes about 30 seconds each time.
Achievement is a bit buggy with the "takedown" portion of it. Had a friend in a private lobby drive around on I92 and took him down a multitude of ways, and a head on collision ended up popping the achievement. Continue takedowns until it pops I suppose.
Ok I'm pissed, I had 100 miles with each of the DLC cars. Not wanting to do another 1,000 miles to get all the mods, I bought the complete modsavers pack which automatically unlock all mods for all cars. Thinking I could get the license plates this way. WRONG! I have all the mods for DLC cars now but no plates for getting 10 non-DLC mods with each car, so am I screwed out of these 2 achievements? What can I do?