Here is the full list of all 50 Guitar Hero: Smash Hits achievements worth 1,000 gamerscore.
You failed a song with available Star Power in single player.
You won a song with the rock meter in red.
You completed a song in every venue.
You performed as the Guitarist.
You completed a song with any instrument on any difficulty in local Quickplay or Career.
You completed the Career as the Guitarist.
You performed as the Bassist.
You created a new custom rocker.
You recovered from a poor performance.
You played a song in the Atlantis venue.
Win an online Pro Face-Off match by 25,000 points or more.
Win an online Face-Off match by 25,000 points or more.
Win an online Face-Off match.
Complete a song in a Band (4 players).
Complete the Career Tutorial.
Complete a song with all Band members on Expert (4 player Band).
Play 20 online matches.
Complete the Career as the Bassist.
Trigger Star Power simultaneously (4 player Band).
Download a song from GHTunes(SM).
Complete the Career in a Band (2-4 players).
Perform as the Vocalist.
Get 100% on a song as a Band (4 players).
Score the highest individual score in a 4 player Band.
Complete the Career as the Drummer.
Complete the Career as the Vocalist.
Complete all four instrument Careers on any difficulty.
Complete a song on Expert + (Drums only).
Create a new custom instrument.
Create a new custom Band logo.
Perform as the Drummer.
Win a Band vs. Band match (8 players).
Create a custom tattoo.
Win an online Pro Face-Off match.
Win 50 online matches.
Get a 100 note streak in the song Through The Fire and Flames on Hard or higher as the Drummer.
Play 150 songs throughout your entire Career.
Score 5 stars in a song on Expert with Lars Umlaut in single player.
Complete single player Expert Career on all instruments.
Score 95% or more on the song Killer Queen as the Vocalist (Expert).
Complete the song YYZ with 5 stars on Expert Bass.
Complete Through The Fire And Flames with 4 stars or more as the Guitarist on Expert.
Complete the song Raining Blood with 5 stars as the Drummer on Expert+.
Hit all Open Strum notes in the song Laid To Rest as the Bassist.
Complete 100% on any song on Expert in single player.
Perfectly play the Let's Play! section in the song Play With Me as a lead Guitarist on Expert.
Complete the song Smoke On The Water as the Vocalist.
Perfectly play the First Blood section of Raining Blood as the Guitarist on Expert.
Get 5 stars on the song Beast And The Harlot Expert Drum without using Star Power.
Score 2,000,000 points on Free Bird as a Band.