Here is the full list of all 46 Squids Odyssey achievements.
Unlock all cursed helmets in your inventory
Unlock all helmets in your inventory
Complete Chapter 6
Recruit Kapono
Recruit Cleef
Complete Chapter 5
Complete Chapter 4
Recruit Brad
Level up a squid to level 25
Complete Chapter 3
Finish "The Spirit of the West" in 1 turn without inventory items
Recruit Ronimo
Invoke a mighty kraken
Recruit Calamary Jane
Complete Chapter 2
Defeat 10 enemies in one turn
Recruit Jammer
Defeat 500 enemies
Level up a squid to level 10
Beat the first Guardian
Complete Chapter 1
Hit 6 enemies in one stomp attack
Each squid should bounce on something at each turn in mission "Holding Ground"
Do 10 combos in mission "The Iron Throne"
Heal 500 HP with a healer squid
Recruit Venus
Finish mission "back to the wall" in 2 turns
Push an enemy in a hole with a shoot attack in mission "Lady in the Water"
Recruit Vesper
Play a mission with the redemption hat
Give a 5 combo melee hit
Recruit Sammo
Recruit Clint
Recruit Oktoku
Use 10 miracle tentacles
Defeat 50 enemies on a Seahorse
Unlock all seahorses
Defeat 50 enemies with a jellyfish
Level up all squids to level 10
Level up all squids from to level 25
Complete Chapter 7
Complete Chapter 8
Get 3 stars for all story missions
Get 3 stars for all bonus missions
Complete all missions in Pro Mode
Recruit Magnus