Here is the full list of all 41 Chaos Sector achievements.
Unlock the collection Chengsong in game.
Unlock the collection Jade in game.
Unlock the collection Hardshell in game.
Unlock the collection Thunder in game.
Unlock the collection Bontenmaru in game.
Unlock the collection Saizo in game.
Unlock the collection Tubamejiro in game.
Unlock the collection Tsuruhime in game.
Unlock the collection Tigerhill in game.
Unlock the collection Redsunshine in game.
Unlock the collection Wenchang Lord in game.
Unlock the collection Sharp Blade in game.
Unlock the collection Giant Armour in game.
Unlock the collection Toxic Smog in game.
Unlock the collection Boso Ghost in game.
Unlock the collection Typhoeus's Core in game.
Unlock the collection Submarine in game.
Unlock the collection Tribute Ship in game.
Unlock the collection Cruiser in game.
Unlock the collection Battleship in game.
Unlock the collection Iron Cavalry in game.
Unlock the collection Arbalester in game.
Unlock the collection Submarine(P) in game.
Unlock the collection Cargo Ship in game.
Unlock the collection Cruiser(P) in game.
Unlock the collection Battleship(P) in game.
Tanegashima
Unlock the collection Tanegashima in game.
Unlock the collection Kraken in game.
Unlock the collection Siren in game.
Unlock the collection Iron Beetle in game.
Unlock the collection Phoenix in game.
Unlock the collection Alien Warrior in game.
Unlock the collection Typhoeus in game.
Star Fort
Unlock the collection Star Fort in game.
Use Northsky Fleet to clear game with Ending Ⅰ.
Use Northsky Fleet to clear game with Ending Ⅱ.
Use Emishi Pirates to clear game with Ending Ⅰ.
Use Emishi Pirates to clear game with Ending Ⅱ.
Unlock the collection Selena in game.