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 20
Scored an "A" rank during a mission in Classic mode
Collected 500 beacons
Completed all story missions on Classic difficulty
Earned a mission medal playing on any difficulty
Completed all story missions on Casual or Classic difficulty
Used a Regenerator to revive your dragon during a mission
Completed all missions for Forest, Ancient Ruins, and Lava Lake on any difficulty
Defeated 3 enemy bosses
Completed all missions for Coral Lake East, Coral Lake West and Underground Lake on any difficulty
Killed 2000 enemy creatures
Collected 18 different Antibodies from creatures on Draco
Achieved player level 10
Evolved your first dragon
Purchased 3 dragons from the shop
Killed 500 enemy creatures
Killed 200 enemies using only your dragon's secondary skill
Killed 200 enemies using only your dragon's main skill
Used 10 Ampoules
Achieved player level 5
Looted 1 rare item and 25 common items
Fired 3000 tracking missiles
Used 1 Ampoule during a mission
Unlocked a new skill by feeding your dragon
Purchased 1 Item Pack using credits or Jewels
Scored "C" rank or higher on a mission in any difficulty mode
Started your first mission with Icarus Division
Killed 50 enemy creatures
Performed a barrel roll by leaning left or right
Activate your wingman dragon communicator and issue a voice command
Use voice commands to navigate to the Shop, Inventory, and Dragon Roost
Acquire all medals for every story mission in the game
Achieve player level 40
Multiplayer: Defeated the White Phantom 3 times
Multiplayer: Scored "S" rank 3 times
Multiplayer: Completed all multiplayer missions on any difficulty
Multiplayer: Completed 5 multiplayer missions
Multiplayer: Completed 1 multiplayer mission
Multiplayer: Clear mission 25 times.
Defeated bosses 10 times in "S" rank.
Used 100 ampoules
Achieve player level 50
Collect over 2,000,000 in credits in your account
Kill 10000 enemy creatures
Use 25 regenerators to revive your dragon during missions