Here is the full list of all 43 DragoDino achievements worth 1,000 gamerscore.
Gather 1000 coins
Kill 10000 enemies
Buy 100 seller's objects
Gather 10000 yellow crystals
Beat the Queen with Bob
Beat the Queen with Ralph
Beat the Dragon Guardian with Bob
Beat the Dragon Guardian with Ralph
Beat BigDaddyFluffy with Bob
Beat BigDaddyFluffy with Ralph
Beat the Queen with Tank
Beat Queen in coop
Unlock Ralph
Finish campaign in normal difficulty
Buy 50 seller's objects
Finish level 8 in coop
Finish level 7 in coop
Beat the Dragon Guardian with Tank
Buy 10 seller's objects
Beat the Dragon Guardian in coop
Finish level 5 in coop
Finish level 4 in coop
Beat BigDaddyFluffy with Tank
Beat BigDaddyFluffy in coop
Finish level 2 in coop
Kill 1000 enemies
Finish level 1 in coop
Finish the secret level
Gather 100 coins
Gather all story
Finish campaign in hardcore difficulty
Beat the Queen
Unlock Tank
Beat the Queen with Lola
Unlock the secret level
Beat the Dragon Gardian
Beat the Dragon Guardian with Lola
Gather 1000 yellow crystals
Beat BigDaddyFluffy with Lola
Beat BigDaddyFluffy
Kill 100 enemies
Gather 10 coins
Gather 100 yellow crystals