The Simpsons Game

Doing it this way, you should have no problems at all with this achievement. Here's what to do:

Do every other achievement first. This means complete the game etc. and then find all of the collectables. The two reasons for this are that you'll know the levels like the back of your hand and also, once you have found all of the collectables your 'super hero' powers become UNLIMITED.

This means that homer's burp never runs out and lisa's saxophone never runs out etc. Therefore you can just run around constantly hitting the 'b' button and all enemies will be stopped in their tracks and so you don't have to worry about them as much. And if you're bart you can just keep firing constantly at every enemy in sight.

A good example of this is on the level people struggle with most which is 'Big Super Happy Fun Fun Game'. Just run around with Lisa constantly hitting 'b' and any enemy that comes near you (even if they are rolling at you) will be stopped in their tracks by the saxophone power and they will then actually start attacking each other. This works just as well with homer's burp. You can just run to all the points in the level that you need to and not have to worry about the enemies.

You can pretty much roll through each level with ease using this technique. If anyone has any trouble with any particular level just message me on live and I'll give any other tips I can for that level.