Disney Infinity 30 Edition
30 Achievements
1,180
Great Collection
Complete all Challenges in Marvel Battlegrounds
15
How to unlock the Great Collection achievement in Disney Infinity 30 Edition - Definitive Guide
Go to the Challenges menu and pick them one by one to beat them. Each challenge requires you to beat a certain number of characters ranging from 1-5 but if you only have one character figure and die or lose the challenge, then you can simply restart the challenge. However if you have more character figures and one dies, then you can put a new one on the base and continue the same challenge without restarting. Although that should not be necessary, as it is very easy. If you are close to dying, then collecting green sparks will refill your health meter. Once you have beaten all 28 challenges (which takes about 2.5 hours if you play straight through) then the trophy will pop.
There are 28 challenges to go through, all of the challenges will be unlocked after you complete the story. The challenges will have you fighting various different Marvel characters in a variety of scenarios. The challenges aren't particularly hard; I would go for any Power Discs that spawn on the map, as well as all health and special move sparks. The achievement will unlock upon completion of the final challenge.
Therefore, we go through the History mode (30 - 40 minutes), and then (or in parallel) complete the opening tests (2.5 - 3 hours).
If a character dies during the test, you can replace it with another one and continue. But if you only bought one figure, you will have to start the task from the beginning. On Easy difficulty, there should be no particular difficulties.