specific difficulty level, the next tier of songs is unlocked once the required number of songs on the current tier (3-5, depending on difficulty and console) are completed. Additionally, the encore song for a particular tier is only made available once its requirements are completed. On the Easy difficulty setting, there are no encores available, but the next tier will be unlocked immediately after completing the required songs in the previous tier. Successful completion of a song on Medium or higher difficulty during Career mode will earn the player in-game cash. Higher difficulty levels and better scoring performances are rewarded with more cash. In-game money can be used at The Store to buy various items. Some items are available only after completing all songs at higher difficulty levels or 5-star performances. Within The Store, the player can purchase new Gibson guitars, guitar finishes, three additional characters, alternate outfits for the eight characters available from the start, bonus songs, and videos. For unknown reasons, the bonus videos are absent from the PAL version of the game. Within the Xbox 360 version, there is also an option to access the Guitar Hero II content on the Xbox Live Marketplace. Multiplayer There are three different multiplayer modes available: Cooperative One player plays lead guitar while another plays either bass guitar or rhythm guitar, depending on the song. Both players share a score, rock meter, star power meter, and streak multiplier. Cooperative mode is the only multiplayer mode in which a song can be failed. Star power can only be activated by both players simultaneously. Face-Off This is the same multiplayer mode as featured in the original game, though in Guitar Hero II both players can select their own level of difficulty. In this mode, players alternate between playing sections of the selected song. The scores are weighted so that a player who hits fewer notes on Easy difficulty may not necessarily lose against an opponent on Expert difficulty who hits more notes. Pro Face-Off Players play the full lead guitar track on the same difficulty. For the PlayStation 2 mode, this is available upon completion of any career level, while for the Xbox 360 version, the mode is unlocked after completing the career mode at Easy level or higher. The score system is identical as the song could be played alone, but songs cannot be failed in this mode. Although, online multiplayer was