When you complete the indicated task the corresponding guitar will become available for purchase at The Vault.

Unlock 'Toys In The Attic' (Rocking Horse) Guitar:
On the Easy difficulty setting get a 5 Star rank on ALL songs except the bonus song.

Unlock 'Rock In A Hard Place' Guitar:
On the Medium difficulty setting get a 5 Star rank on ALL songs except the bonus song.

Unlock Doubleneck Guitar:
On the Expert difficulty setting get a 5 Star rank on ALL songs except the bonus song.

Unlock 'Nine Lives' (Daredevil) Guitar:
On the Easy difficulty setting complete Career mode.

Unlock 'Permanent Vacation' Guitar:
On the Medium difficulty setting complete Career mode.

Unlock 'Get A Grip' Guitar:
On the Hard difficulty setting complete Career mode.

Unlock 'Walk This Way' Guitar:
On the Expert difficulty setting complete Career mode.

Complete the indicated task and then access the corresponding song by pressing Blue at the main setlist to bring up 'The Vault' track list.

Unlock 'Kings and Queens' by Aerosmith:
Complete Career mode.

Unlock 'Joe Perry Guitar Battle' by Joe Perry:
After the 6th tier warm-up acts complete 'Guitar Battle vs. Joe Perry'.

At the 'Main' menu go to 'Options' and then 'Cheats' and select 'Enter New Cheat' and enter the following codes (each combination of notes must be strummed) to unlock the corresponding feature. To disable a cheat press Green at the 'Cheats' menu.

Unlock ALL Songs in Quick Play Mode:
Press (RY) (GR) (GR) (RY) (RY) (GR) (RY) (RY) (GR) (GR) (RY) (RY) (GR) (RY) (RB).

Unlock Hyperspeed Mode:
Press (YO) (YO) (YO) (YO) (YO) (RY) (RY) (RY) (RY) (RB) (RB) (RB) (RB) (RB) (YB) (YO) (YO). This mode will makes the charts faster. There are 5 Hyperspeed levels and to cycle through them Press Green on the Hyperspeed option at the 'Cheats' menu.

Unlock Performance Mode:
Press (RY) (RB) (RB) (RY) (RY) (YB) (YB) (YB) (RB) (RY) (RB) (RB) (RY) (RY) (YB) (YB) (YB) (RB). Everything disappears except for the performance in this mode.

Unlock No Fail Mode:
Press (GR) (B) (GR) (GY) (B) (GY) (RY) (O) (RY) (GY) (Y) (GY) (GR). This code cannot be used in Career mode.

Unlock Precision Mode:
Press (RY) (RB) (RB) (RY) (RY) (YB) (YB) (YB) (RB) (RY) (RB) (RB) (RY) (RY) (YB) (YB) (YB) (RB).

Unlock Air Guitar Mode:
Press (RY)(GR)(RY) (RY) (RB) (RB) (RB) (RB) (RB) (YB) (YB) (YO).

When you have completed the indicated task the correspondng character will be available for purchase in Career mode.

Unlock DMC:
Beat 'King of Rock' by Run DMC

Unlock Joe Perry:
In Career mode defeat Joe Perry in a Guitar Battle.