Here is the full list of all 47 Rocksmith 2014 achievements.
Attempt and fail Score Attack 10 times in a row
Complete 500 Missions
Score at least 10,000,000 points in Ninja Slide N
Score 10,000,000 points in Temple of Bends
Complete 60 minutes in Session Mode
Score at least 10,000,000 points in Hurtlin' Hurdles
Score 10,000,000 points in Scale Racer
Complete all 3 levels in a Progression in Return to Castle Chordead
Score at least 10,000,000 points in Ducks ReDux
Complete all 6 levels in a Scale Set in Scale Warriors
Score at least 10,000,000 points in Gone Wailin’
Play with over 50 instruments
Score 10,000,000 points in Harmonic Heist
Clear 50 songs on Score Attack Easy, Medium, Hard or Master
Hit all bass techniques at least once
Clear 30 songs on Score Attack Medium, Hard or Master
Clear 15 songs on Score Attack Master
Clear 20 songs on Score Attack Hard or Master
Get Platinum on Score Attack Master
Complete 214 Missions
Play Learn a Song for 25 hours
Achieve 100% Mastery on 10 songs
Score 10,000,000 points in String Skip Saloon
Play all Rocksmith 2014 songs at least once
Get Platinum on Score Attack Easy, Medium, Hard or Master
Get Platinum on Score Attack Medium, Hard or Master
Get Platinum on Score Attack Hard or Master
Play Rocksmith 2014 on 5 consecutive days
Score at least 10,000,000 points in Star Chords
Play Learn a Song for 10 hours
Clear 1 song on Score Attack Master
Play Session Mode between 11:59pm and 3am
Successfully play 30 unique chords
Achieve 100% Mastery on any song
Complete 50 RS Recommends items
Get a streak over 250 that bridges multiple songs
Hit all guitar techniques at least once
Keep the band alive for over 12 minutes in Session Mode
Create and save a tone using Eden gear
Complete 4 Session Mode Missions
Play Session Mode between 10am and 2pm
Use the One More Song feature
Create and save a tone using Marshall gear
Create and save a tone using Orange gear
Exclude a song from the Nonstop Play playlist
Play a Solo at >95% Accuracy
Complete Soundcheck