Guitars:
The Log - 5 Star every song on Expert Mode
Axe - Beat Expert Mode
Casket - Beat Medium Mode
Eyeball - 5 Star every song on Hard Mode
Fish - Beat Easy Mode
Snaketapus - Beat Hard Mode
USA - 5 Star every song on Easy Mode
Viking - 5 Star every song on Medium Mode

Basses:
Cream SG - 5 stars on 20 co-op songs
Gibson Grabber - Beat 20 co-op songs
Gibson SG Bass - Beat 10 co-op songs
Gibson Thunderbird - Beat 30 co-op songs
Hofner Bass - Beat all co-op songs
Lava Pearl Musicman Stingray - Get 5 stars on 10 co-op songs
Natural Maple Gibson Grabber Bass - Get 4 stars on all co-op songs
Natural Sunburst Gibson Thunderbird Bass - Get 5 stars on all co-op Songs