To get this achievement before start the game you can enter some cheat codes that will help u complete every level 100% That means you find all Parcels, Artifacts and get True Adventer on every level which will be easier with the cheats.
Enter these cheats in the classroom by the chalkboard.
If you want to enter anymore cheats here is the webcitehttp://cheats.ign.com/ob2/068/953/953315.html
Also remember before you start playing the levels that you have to turn all of the cheats
When you are playing through storymode you most likely will not get all 10 artifacts because some of the require a special character like a person that can jump higher. So you can just go back through the level on freeplay which wont be bad because to get the Achievement you have to beat both story and freeplay. There is 3 extra levels to. Also you will need to buy all characters and extras
One more thing you will need to do is find all of the 5 star wars characters hidden through the game.
Good Luck getting this achievement and add a comment if you have any questions