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