The Battle Cats main campaign consist of 3 chapters, each with 48 stages.
Chapter 1
You start at Chapter 1 when playing Battle Cats for the first time. A mini tutorial will run you through on the game basics in Japanese.
Chapter 1 select
As you progress to Stage 7 and beyond, more game features will be unlocked.
Chapter 2
Unlocked when Chapter 1 is completed.
Cost of summoning cats increases by 50%.
Enemies attacks and health increased by 50%.
You will fight a different final boss.
Upon completion, you get Valkyrie Cat and all cat-units/abilities have their levels unlocked from Level 10! You can now level them up to Level 20!
Chapter 3
Unlocked when Chapter 2 is completed.
Cost of summoning cats is twice that of Chapter 1.
Enemies attacks and health increased(compared to chapter 1) by 3x.
Has a different final boss and you get Bahamut Cat upon completion.