Guitar Hero Aerosmith

Pretty simple this one. You have to buy 4 unlockable characters from the vault, each costing $15,000. They are: Joe Perry, DMC (not available from the start, but unlocks half way through career), Tom Hamilton and Bard Whitford. Therefore you need $60,000 at one time. If you're having difficulty saving enough money, simply earn $15,000 with 4 different bands.

Pretty simple this one. You have to buy 4 unlockable characters from the vault, each costing $15,000. They are: Joe Perry, DMC (not available from the start, but unlocks half way through career), Tom Hamilton and Bard Whitford. Therefore you need $60,000 at one time. If you're having difficulty saving enough money, simply earn $15,000 with 4 different bands.

There are a total of 4 characters to unlock they are;
• Joe Perry
• Tom Hamilton
• Brad Whitford
• DMC (available after progressing through career mode)

Each character will cost $15,000 which means you'll need a total of $60,000 for this achievement, however bearing in mind that there are other achievements which require you to purchase unlockables it's a good idea to make use of a small in game exploit. Once you've saved up a whole bunch of cash go to the in game shop and buy all the items you need for the achievement you want to unlock, now you need to make sure you have enough money for the achievement you're going for!

Once you've purchased everything and the achievement has popped use the guide button to dashboard the game, doing so will prevent the game from saving which will mean when you boot it back up not only will you have the achievement you just got but you'll also have all the money you just spent unlocking it again and you're free to use that money to purchase the items needed for one of the other unlockable based achievements!