Full list of all 45 Crimson Dragon achievements worth 1,500 gamerscore. It takes around 25-30 hours to unlock all of the achievements in the base game.
The base game contains 33 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 12 achievements worth 500 Gamerscore.
Achieved player level 40
Completed all story missions on Classic difficulty
Completed all story missions on Casual or Classic difficulty
Completed all missions for Forest, Ancient Ruins, and Lava Lake on any difficulty
Collected 500 beacons
Defeated 3 enemy bosses
Achieved player level 20
Completed all missions for Coral Lake East, Coral Lake West and Underground Lake on any difficulty
Collected 18 different Antibodies from creatures on Draco
Killed 2000 enemy creatures
Purchased 3 dragons from the shop
Achieved player level 10
Evolved your first dragon
Purchased 1 Item Pack using credits or Jewels
Scored an "A" rank during a mission in Classic mode
Earned a mission medal playing on any difficulty
Used a Regenerator to revive your dragon during a mission
Used voice commands to navigate to the Shop, Inventory, and Dragon Roost
Achieved player level 5
Fired 3000 tracking missiles
Used 10 Ampoules
Unlocked a new skill by feeding your dragon
Scored "C" rank or higher on a mission in any difficulty mode
Started your first mission with Icarus Division
Killed 500 enemy creatures
Killed 200 enemies using only your dragon's main skill
Killed 200 enemies using only your dragon's secondary skill
Activated your wingman dragon communicator and issued a voice command
Looted 1 rare item and 25 common items
Performed a barrel roll by leaning left or right
Used 1 Ampoule during a mission
Killed 50 enemy creatures
Acquire all medals for every story mission in the game
Multiplayer: Scored "S" rank 3 times
Multiplayer: Completed all multiplayer missions on any difficulty
Multiplayer: Cleared mission 25 times.
Multiplayer: Completed 5 multiplayer missions
Multiplayer: Completed 1 multiplayer mission
Multiplayer: Defeat the White Phantom 3 times
Achieved player level 50
Defeated bosses 10 times in "S" rank.
Used 25 regenerators to revive your dragon during missions
Killed 10000 enemy creatures
Used 100 ampoules
Collect over 2,000,000 in credits in your account