Hyperballoid HD

There are three gems in each level. They are the shiny purple gems. Hitting one with a ball will make the gem drop down and you collect it by making it land on your paddle. There are 300 gems in both campaigns so as long as you get on average 2 of the 3 gems per level you will get this trophy by the end of the campaign. You get an extra life for every three gems you collect so they are fairly important in the game, you should be aiming to get as many of them as possible. I got this before I finished both campaigns but if you still don't have it by the end, find a level you can finish quickly and keep replaying it while picking up all the gems.

You do not have to get these all in one game. Even if you loose all your lives, the gems you collected will be added to your gem total, so don't worry too much about losing.