Burnout CRASH!

This achievement requires you to earn all the 270 stars on offer in
every event. In each event there are 3 stars for earning points and 2 for fulfilling miscellaneous objectives.

Tips on earning points in each type of event:

Road trip: In road trip you have a set number of cars that will pass your junction and 5 lives in which to do it in. You need 50 million points in road trip to earn all 3 stars. Your basic objective in earning 50m is to keep the amount of cars exiting to a minimum while destroying as much as the environment around you as possible. Keep an eye out for sports cars and gold cars aswell. Try and use crashmeter bonuses to your advantage as well as pizza/bank trucks.

Rush Hour: In rush hour you get 90 seconds to create as much damage as possible to the junction. You also need 50 million points to unlock all 3 stars. Unlike the other events, cars that escape are not the problem and you can earn most of your points destroying buildings. Start off by trying to cause a pile up in the centre and then work your way around destroying buildings/cars until theres not much left at the end. The only tip i can give is too use your crashbreaker a lot during this event to create maximum chaos. I personally found this the easiest to score 3 stars on.

Pile up: In pile up there is a set number of cars but unlike road trip there isnt a life system but you lose inferno multiplier every time a car escapes. You need to score 100 million on each to secure 3 stars. The basic strategy is to try and keep a 5x multiplier while doing as little damage to cars and environment as possible until inferno starts where you need to keep something on fire to continue. You want to keep cars/buildings undamaged until inferno starts to gain as much points as possible. On some of the earlier levels you can just start a pile up towards to centre and when inferno starts, use your crashbreaker to send cars in every direction towards buildings which should be enough to reach 100m or there about. However its harder to do this on the later levels as you are forced to keep moving your car around to stop others escaping which then usually destroys cars/buildings too early. The most important thing is keeping your multiplier high but you can let a couple through if it means a pile up around you isnt disrupted. After i got stuck on a few levels i found an exploit in which to earn 100 million easier. Firstly you need to keep that 5x multiplier whatever the cost. Then when during inferno if you run out of cars to explode near you then try and fall into the nearest hole. Falling into a hole stops the countdown until your car crashes again. This means you can fall down the hole, respawn and then drive into a car/building near that same hole, use your crashbreaker causing damage and fall back into the hole. You can repeat this process over and over until anything near a hole is destroyed which should bring you above 100 million points.
Note: Blowing up gold/sports cars can give you between 15-30 million points each (during a 5x multiplier) and they destroy faster than your average building

Misccelaneous stars:

Triggering super feature (with 100% power):
To trigger the super feature during a road trip you need to fill your crash meter 3 times without losing all your lives. To trigger it with 100% you need to make it without losing a single life. If your concentrating on this then use a car with a lot of aftertouch (as it moves faster) and keep moving around the juction stopping any cars. It may take a few attempts to get used to the pattern in which the cars arrive. Every life lost is a 20% reduction in the superfeatures power so if the objective only requires you to reach 60% then you can lose 2 lives.

Blow up car/building/etc before the superfeature:
These can sometimes be tricky on road trip because you need to concetrate on your lives as well otherwise its game over. Use a car with a lot of power to destroy items quicker

Blow up (x) amount of vehicles on your final explosion (rush hour):
Quite simple, just try and create a pile up of vehicles to blow up at the end. One tip is too not start your pile up at the very start of the event because sooner or later a car is gonna set fire naturally and set off a chain of explosions. I started my pile up 30-40 seconds before the end depending on the amount of vehicles you need to destroy.

Get a 5/10/20x explosion combo:
Use the same strategy than the above by creating a pile up of vehicles and when theres enough use your crashbreaker to destroy them. Also starting your pile up near buildings/car park also helps

Blow up buiding/sports/gold cars:
If you get this objective on rush hour or pile up then just concentrate solely on destroying them and not on points

Get a 3/6x explosion chain
I just created a large pile up with as much cars as possible and let them explode naturally. However it took quite a while to earn this but doesnt take much effort (just let the car run into the centre and let it play itself). There is quite a lot of luck involved with this and if your'e interested you can see your highest chain in the menu's after the event.
MAOraNza adds that If you blow up 2 or more cars at the same time it does not count as a explosive chain but as a combo so dont be surprised if you blow up loads of cars simultaneously without getting this star.
Kamelbarn adds that trying to create a large but scattered group is the best method for getting a high explosion chain


Getting x amount of skillshots:
I found these the trickiest as there hard to set up and you rely a lot on luck. If the objective is just any skillshot then try and send cars into holes/buildings as these are easier than hitting other cars. However if they ask for punt (hitting other cars) skillshots then try and get a few cars near yours and wait until others come close before using your crashbreaker. The same applies for shunt (hitting cars into buildings) and dunk (hitting cars into holes) skillshots but its easier to hit still targets. Also if they ask for incredible skillshots, that is basically hitting them from further distances.
Petit Ver adds that shunt skillshots (aside from hitting buildings) can also be earned by hittting parked cars and that dunk skillshots can be earned through hitting cars into water/pools aswell as into holes.

Get a smash chain:
A smash chain is how much destuctible objects your car can hit at the start of the event. Just try every different path until you find the one with the most objects to hit. This may take a few attempts to get right.
Note: People seem to have trouble with the 11x smash chain on seacrest and 3rd, heres how i did it:
Ok after a few attempts i got the 11x smash chain again, you need to go to the left hand side path. You have to hit everything on that path and cant miss a single thing. As you come out of the path towards the bus take a sharp right so your car crashes between the pool, the bus and a car. You should have been able to crash into a table with an umbrella on it thats next to the pool and this should create an 11x smash chain. Hopefully your car will crash into the bus and the car to maximise chances. Also use the dust storm for better movement.


Destroy car/building during inferno (pile up):
Try and keep as much cars undamaged as possible and dont concentrate on your multiplier because you dont need it. When inferno starts destroy surrounding cars to create an explosion chain, meanwhile move your car towards the item you need to blow up. You can easily use the jumping into a hole method explained earlier by returning to the item if you run out of things to set on fire. You can also do damage to the chosen item before inferno.

Additional tips:
-----I suggest you unlock every vehicle before attempting some of these stars as they can really help (i believe you need 100 for the final vehicle). Also if you complete the final road trip in blueclaw you unlock "elite" mode for all your cars increasing there stats.
-----Cars with high power are usually preferred when going for points as they send cars flying into buildings more often
-----You can get stars over multiple plays of the event and they dont need to all be achieved at once
-----You must finish the event for the star to count and you cant select *crash again" after the game ends because this too will lose you any stars earned so make sure you go back in menus where it awards your stars before retrying
-----The above tips for stars are general and may differ slightly depending on the location your playing at
-----Many of the additional stars may come randomly so i suggest attempting to reach the score first before going for the other stars.

If anyone else has any tips or suggestions please comment and if your stuck on a particular star then ask me and i'll tell you how i obtained it. :)