Here is the full list of all 50 Guitar Hero: Warriors of Rock achievements worth 1,000 gamerscore.
Earned 2000 Stars in QP+
Earned all there is
Earned 1000 Stars in QP+
Maxed out the multiplier
5-starred as a Medium Standard Band
Played any song 10 times
Stood up to Father Brown
Faced the Truth
5-starred as a Medium Non-Standard Band
Followed the Feed
Earned Gold on 2 Band Challenges at once
5-starred 5 random songs
Earned 500 Stars in QP+
5-starred 5 chosen songs
Laid down 100 notes in GH(tm)Jam
Tried out some Competitive games
Guitarist and Bassist tied
Earned a band score ending in 000
Supported the GH(tm)Tracks community
Full-Comboed a tutorial exercise
Dominated all character chapters
Hit 150,000 notes in Quest
Dominated 4 chapters
Bettered your own grade
Dominated 2 chapters
Hit 75,000 notes in Quest
Dominated a song in Quest
Bettered another person's grade
Earned Gold on 3 challenges at once
Earned 100 Stars in QP+
Scored over a million in a Power Challenge
Earned an elite score
Withstood the Punishment
Earned Diamond on 2 challenges at once
Earned a score which is evenly divisible by 6
Endured the Storm
Survived the Black Widow
Collected at least 115 songs
Defeated the scourge of Rock
Freed the Demigod of Rock
Awakened Warrior Axel (Quest)
Charmed Warrior Casey (Quest)
Released Warrior Lars (Quest)
Summoned Warrior Pandora (Quest)
Regained the Legendary Guitar
Invoked Warrior Austin (Quest)
Stole the Spotlight
Recruited Warrior Judy (Quest)
Liberated Warrior Echo (Quest)
Unleashed Warrior Johnny (Quest)