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