Complete the indicated task to unlock the corresponding bass at the shop for Co-op mode.

Gibson Cherry SG: Complete 10 songs in Co-op mode.
Gibson Cream SG: Get a five star rank on 20 songs in Co-op mode.
Gibson Grabber: Complete 20 songs in Co-op mode.
Gibson Natural Maple Grabber: Get a four star rank on all songs in Co-Op mode.
Gibson Natural Sunburst Thunderbird: Get a five star rank on all songs in Co-Op mode.
Gibson Natural Thunderbird: Get a five star rank on all of the regular songs in Co-op mode.
Gibson Thunderbird: Complete 30 Songs in Co-op mode.
Hofner: Complete all Co-Op mode songs.
Musicman Lava Pearl Stingray: Get a five star rank on 10 songs in Co-Op mode.