Counterproductive
Not unlocked yetComplete an arcade level with 0-star rank
Arcade mastery
Not unlocked yetComplete all arcade levels with 3-star rank
Arcade 10
Not unlocked yetComplete 10 arcade levels
Arcade 20
Not unlocked yetComplete all 20 arcade levels
Arcade 5
Not unlocked yetComplete 5 arcade levels
It wasn't in the tutorial!
Not unlocked yetKill a hedgehog
First boss defeated
Not unlocked yetBeat the first boss
Second boss defeated
Not unlocked yetBeat the second boss
Third boss defeated
Not unlocked yetBeat the third boss
Final boss defeated
Not unlocked yetBeat the final boss
Challenge mastery
Not unlocked yetComplete all challenges with 3-star rank
Challenge 10
Not unlocked yetBeat 10 challenge levels
Challenge 22
Not unlocked yetBeat 22 challenge levels
Challenge 44
Not unlocked yetBeat all 44 challenge levels
100% Easy
Not unlocked yetComplete the game on easy difficulty or higher
100% Hardcore
Not unlocked yetComplete the game on hardcore difficulty
100% Normal
Not unlocked yetComplete the game on normal difficulty or higher
Bomber
Not unlocked yetKill 25 enemies using bombs
Living bullet
Not unlocked yetKill 10 enemies using another enemy
Multi kill
Not unlocked yetKill 5 enemies by bouncing from one to another
Deadly punch
Not unlocked yetPunch 100 enemies
Stomper
Not unlocked yetKill 100 enemies using stomp
Pacifist
Not unlocked yetComplete a story level without killing any creature
Death from above
Not unlocked yetKill 10 enemies using a falling rock