Without Late Night:
A*: Master the guitar skill and complete all of the skill challenges for that skill.
A: Master the guitar skill and complete most of the skill challenges.
A-: Master the guitar skill and complete some of the skill challenges.
B+: Master the guitar skill and complete one of the skill challenges.
B: Master the guitar skill.
B-: Get to level 9 in the guitar skill.
C+: Get to level 8 in the guitar skill.
C: Get to level 7 in the guitar skill.
C-: Get to level 6 in the guitar skill.
D+: Get to level 5 in the guitar skill.
D: Get to level 4 in the guitar skill.
D-: Get to level 3 in the guitar skill.
F: Get to level 2 or less in the guitar skill.
A: Master the guitar skill and complete most of the skill challenges.
A-: Master the guitar skill and complete some of the skill challenges.
B+: Master the guitar skill and complete one of the skill challenges.
B: Master the guitar skill.
B-: Get to level 9 in the guitar skill.
C+: Get to level 8 in the guitar skill.
C: Get to level 7 in the guitar skill.
C-: Get to level 6 in the guitar skill.
D+: Get to level 5 in the guitar skill.
D: Get to level 4 in the guitar skill.
D-: Get to level 3 in the guitar skill.
F: Get to level 2 or less in the guitar skill.
With Late Night:
A*: Master the piano, bass, drum and guitar skills. Then complete all of the skill challenges for one of those skills.
A: Master the piano, bass, drum and guitar skills. Then complete most of the skill challenges for one skill (e.g. 3/4 skill challenges complete or 4/5)
A-: Master the piano, bass, drum and guitar skills. Then complete some of the skill challenges of one skill (e.g. 2/4 skill challenges complete or 3/5)
B+: Master the piano, bass, drum and guitar skills. Then complete a skill challenge of one skill or earn 500 simoleons in tips when playing an instrument.
B: Master the piano, bass, drum and guitar skills.
B-:Master the guitar skill and 2 skills from the choices; piano, bass or drum.
C: Master the guitar skill.
C-: Get to level 8 in the guitar skill.
D+: Get to level 6 in the guitar skill.
D: Get to level 4 in the guitar skill.
D-: Get to level 3 in the guitar skill.
F: Get to level 2 or less in the guitar skill.
A: Master the piano, bass, drum and guitar skills. Then complete most of the skill challenges for one skill (e.g. 3/4 skill challenges complete or 4/5)
A-: Master the piano, bass, drum and guitar skills. Then complete some of the skill challenges of one skill (e.g. 2/4 skill challenges complete or 3/5)
B+: Master the piano, bass, drum and guitar skills. Then complete a skill challenge of one skill or earn 500 simoleons in tips when playing an instrument.
B: Master the piano, bass, drum and guitar skills.
B-:Master the guitar skill and 2 skills from the choices; piano, bass or drum.
C: Master the guitar skill.
C-: Get to level 8 in the guitar skill.
D+: Get to level 6 in the guitar skill.
D: Get to level 4 in the guitar skill.
D-: Get to level 3 in the guitar skill.
F: Get to level 2 or less in the guitar skill.