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