Here is the full list of all 40 Skylanders SuperChargers achievements worth 1,000 gamerscore.
Reached Portal Master Rank 40
Honked your first vehicle horn
Completed 10 quests given by Tessa
Earned 6 gold Emblems
Came in 1st place in any Race level on any difficulty
Reached Portal Master Rank 25
Solved 15 Live Wire Lock puzzles
Won 15 Games of Skystones: Overdrive
Collected 43 Skystones
Equipped 3 different Mods on one vehicle
Beat Land of the Undead
Beat Battlebrawl Island
Beat The Spell Punk Library
Beat Gadfly Glades
Beat Cap'n Cluck's Chicken HQ
Beat Monstrous Isles
Beat Ridepocalypse Demo Derby
Beat Vault of the Ancients
Beat The Bandit Train
Defeated The Darkness on any difficulty
Had at least 5 active Legendary Treasures in the Academy at once
Collected 10 Legendary Treasures
Reached Portal Master Rank 10
Earned all Land vehicle stars
Beat The Cloudbreather's Crag
Beat The Cloud Kingdom
Collected 4 vehicle Mods
Fully upgraded a vehicle
Completed a Race level
Beat The Rift to Skylands
Equipped your first Mod
Defeated an enemy while SuperCharged
Complete Story Mode on Nightmare difficulty
Reach Portal Master Rank 55
Reach Portal Master Rank 70
Come in 1st place in any Race level on each difficulty
Enter a vehicle in Co-Op mode
Achieve gold on 12 Emblems
Complete 10 quests given by Hugo
Fully complete a Driver quest from Buzz