Here is the full list of all 38 Skylanders: Spyro's Adventure achievements worth 1,000 gamerscore.
Unlock all other Achievements. (primary profile)
The first time you put your Skylander on the Portal of Power. (primary profile)
Complete the Shattered Island level. (primary profile)
Complete the Stormy Stronghold level and acquire the elemental source. (primary profile)
Complete the Leviathan Lagoon level and acquire the elemental source. (primary profile)
Complete the Stone Town level and acquire the elemental source. (primary profile)
Complete the Falling Forest level and acquire the elemental source. (primary profile)
Complete the Battlefield level and acquire the elemental source. (primary profile)
Complete the Creepy Citadel level and acquire the elemental source. (primary profile)
Complete the Lava Lakes Railway level and acquire the elemental source. (primary profile)
Complete the Arkeyan Armory level and acquire the elemental source. (primary profile)
Complete the adventure mode by finishing the game. (primary profile)
Get 3 stars in any one level. (primary profile)
In the Leviathan Lagoon level, dodge 30 sharks without being hit. (primary profile)
In Falling Forest, beat Evil Ent while more than 5 of his seeds are on the field. (primary profile)
Beat Kaos' Evil minions in Lava Lakes Railway with only Gill Grunt's Power Hose. (primary profile)
Avoid being hit by the laser traps during the boss fight in Creepy Citadel. (primary profile)
Defeat Kaos without swapping Skylanders during the battle. (primary profile)
Defeat 30 enemies while riding the War Machine in the Arkeyan Armory level. (primary profile)
Never use any rocket in the Falling Forest level. (primary profile)
Get swallowed by the Leviathan 5 times in the Leviathan Lagoon level. (primary profile)
Destroy all of the rocks in the Molekin Mine level. (primary profile)
Complete the Troll Warehouse level without getting injured by the landmines. (primary profile)
Complete Crystal Eye Castle without being hit by any of the rolling barrels. (primary profile)
Complete your first challenge level! (primary profile)
Complete 3 Challenge levels. (primary profile)
The first time you purchase an upgrade for your Skylander. (primary profile)
Purchase all upgrades for any one Skylander. (primary profile)
Level up any one Skylander to level 10. (primary profile)
Collect 10 Hats. (primary profile)
Have your Skylander equip a hat for the first time. (primary profile)
Unlock any Elemental Gate. (primary profile)
Defeat 15 Chompies in the Shattered Island level. (primary profile)
Open any treasure chest. (primary profile)
Collect 10 Story Scrolls. (primary profile)
Collect 10 Legendary Treasures. (primary profile)
Collect 10 Soul Gems. (primary profile)
Play and complete any PvP match: win or lose. (primary profile)