How do you defeat devastator in transformers revenge of the fallen game?

To defeat Devastator in the Transformers: Revenge of the Fallen game, follow these steps:

1. Wait until Devastator attacks the city. He will charge at the city every few rounds.

2. When Devastator charges at the city, use your jet to fly up to his head.

3. Once you reach Devastator's head, press Y to launch yourself onto it.

4. Once you are on Devastator's head, press X repeatedly to attack his weak spot.

5. Continue attacking Devastator's weak spot until he is defeated.

Here are some additional tips for defeating Devastator:

* Use the X-ray ability to lock onto Devastator's weak spot. This will make it easier to hit.

* Use the melee attack to stun Devastator. This will give you an opportunity to attack his weak spot without taking damage.

* Use the dodge move to avoid Devastator's attacks.