Here is the full list of all 22 Air Guitar Warrior Gamepad Edition achievements worth 1,000 gamerscore.
Kill 1500 monsters with Flaming Chord
Kill 1000 monsters with GTR-8000
Kill 500 monsters with Spectral Axe
Kill 1000 monsters with The Legend
Kill 500 monsters with Icy Death
Kill 500 monsters with Sludge Stick
Kill 500 monsters with Thunder Axe
Kill 500 monsters with The Grin
Reach player rank 30
Complete Album 1: Road to Devastation
Complete Album 2: Vikings on the Storm
Complete Album 3: Born to Bike
Complete Album 4: Christmas Album
Complete Album 5: Wilderness Years
Complete Album 6: The Demon Inside
Complete Album 7: Ancients Awaken
Complete Album 8: Electric Candyland
Earn The Legend in The Live Album
Defeat Heavy Metal Zeus in the Temple of the Rock Gods
Reach 100% completion in a track (tracks 1-5 don't count)
Complete a track without losing any health (tracks 1-5 don't count)
Complete a level without running out of ammo (boss tracks don't count)