Here is the full list of all 26 Unruly Heroes achievements.
Complete first Skull Canyon level
Obtain 100 coins
Reach 200 meters in gliding distance
Unlock all checkpoints of a map
Perform a 20 hits combo
Activate any character's power
Play the whole adventure
Kill the Skull Canyon boss
Complete world Skull Canyon
Complete world Taoist Temple
Complete Underworld
Complete world Flaming Mountain
Obtain 1000 coins
Obtain all scrolls
Obtain all skins
Complete one level under 5 minutes
Enter inside a controllable creature
Finish a level without losing any character
Perform 100 walljumps in total
Trigger 4 power up at the same time
Grab two enemies in less than 10 seconds
Kill one of you coop friend
Play a Multiplayer match
Finish any level at emerald rank
Finish all levels at emerald rank
Finish any world at emerald rank