Select "Cheats" at the main menu, then "Enter New Cheat". Enter one of the following codes:
| Unlockable: | How to Unlock: |
| ...And Justice for All (50 GP) | Earn 100 stars in Band Career or any single instrument Career. |
| 2 X 4 (10 GP) | Earn a band Hot Streak (4 player band). |
| Better Than You (10 GP) | Win an online Pro Face-Off match. |
| Black (10 GP) | Win an online battle match with the Fade to Black power up. |
| Blitzkrieg (10 GP) | Win an online Band v Band match (8 players). |
| Hero of the Day (30 GP) | Complete a song on Expert + in Quickplay or Career (drums only). |
| Holier Than Thou (150 GP) | Complete all instrument careers. |
| James Hetfield (25 GP) | Complete the career as the vocalist. |
| Kirk Hammett (25 GP) | Complete the career as the guitarist. |
| Lars Ulrich (25 GP) | Complete the career as the drummer. |
| Metal Militia (30 GP) | 100% a song (4 player band). |
| Metallica (75 GP) | Complete any instrument career on Expert (Guitar, Bass, Vocals, Drums or Band). |
| Nothing Else Matters (50 GP) | Complete the career in a band (2-4 player band). |
| One (10 GP) | Complete a song with any instrument on Hard or Expert in local Quickplay or Career. |
| Reload (5 GP) | Download a song from GHTunes. |
| Ride the Lightning (10 GP) | You triggered star power simultaneously (4 player band). |
| Robert Trujillo (25 GP) | Complete the career as the bassist. |
| Seek & Destroy (25 GP) | Play 20 online matches. |
| The Ecstacy of Gold (50 GP) | Earn $15,000. |
| The Four Horsemen (20 GP) | Complete a song with all band members on expert in Quickplay or Career (4 player band). |
| The Memory Remains (5 GP) | View a Metallifacts video. |
| The More I See (5 GP) | Complete the Tutorials. |
| The Struggle Within (10 GP) | Complete a song in a band in Quickplay or Career (4 players). |
| The Unforgiven (10 GP) | Win an online Face-Off match. |
| Wherever I May Roam (15 GP) | Complete a song in every venue. |
| Unlockable: | How to Unlock: |
| James Hetfield | Earn 100 stars in vocalist career |
| James Hetfield Classic | Earn 150 stars in vocalist career |
| James Hetfield Zombie | Earn 200 stars in vocalist career |
| King Diamond | Beat the song "Evil" in any instrument career |
| Kirk Hammett | Earn 100 stars in guitar career |
| Kirk Hammett Classic | Earn 150 stars in guitar career |
| Kirk Hammett Zombie | Earn 200 stars in guitar career |
| Lars Ulrich | Earn 100 stars in drum career |
| Lars Ulrich Classic | Earn 150 stars in drum career |
| Lars Ulrich Zombie | Earn 200 stars in drum career |
| Lemmy | Beat the song "Ace of Spades" in any instrument career mode |
| Robert Trujillo | Earn 100 stars in bass career |
| Robert Trujillo Classic | Earn 150 stars in bass career |
| Robert Trujillo Zombie | Earn 200 stars in bass career |
Complete the indicated task in Career mode to unlock the corresponding song.
Complete the indicated task in Career mode to unlock the corresponding instrument.
| Unlockable: | How to Unlock: |
| Astronomy (10 GP) | You hit every star power phrase in the song Orion. |
| Battery (30 GP) | You scored 1,000,000 on the song Battery as a band. |
| Blackened (5 GP) | You created a custom tattoo. |
| Creeping Death (30 GP) | You scored 575,000 on the song Creeping Death as the guitarist. |
| Cure (5 GP) | You recovered from a poor performance in Quickplay or Career. |
| Damage Inc. (5 GP) | You performed as the drummer. |
| Disposable Heroes (5 GP) | You created a new custom rocker. |
| Dyer's Eve (30 GP) | You scored 450,000 on the song Dyer's Eve as the drummer. |
| Enter Sandman (30 GP) | You scored 330,000 on the song Enter Sandman on guitar. |
| Eye of the Beholder (5 GP) | You created a new custom band logo. |
| Fight Fire with Fire (30 GP) | You scored 340,000 on the song Fight Fire with Fire as the bassist. |
| Fixxxer (5 GP) | You created a new custom instrument. |
| Green Hell (15 GP) | Drummed every green note and finished the song Blood and Thunder with the rock meter in green. |
| Invisible Kid (5 GP) | You performed as the bassist. |
| King Diamond (5 GP) | You rocked out as King Diamond. |
| Lemmy (5 GP) | You rocked out as Lemmy. |
| Master of Puppets (10 GP) | You scored the highest individual score on a song in a band. |
| Motorbreath (5 GP) | You performed as the vocalist. |
| Some Kind of Monster (5 GP) | You performed as the guitarist. |
| Stone Cold Crazy (30 GP) | You scored 65,000 on Stone Cold Crazy as the vocalist. |
| Stone Dead Forever (5 GP) | You completed a song at The Stone venue. |
| The House Jack Built (10 GP) | You completed a song in every In-the-Round venue. |
| The Unforgiven II (10 GP) | You won an online Face-Off match by 25,000 points or more. |
| The Unforgiven III (10 GP) | You won an online Pro Face-Off match by 25,000 points or more. |
| Trapped Under Ice (5 GP) | You completed a song at the Ice Cave venue. |
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Guitar Hero: Metallica Items
