Here is the full list of all 75 Wandersong achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Did a slow clap at an appropriate time
Saved the city from a monster attack
Helped victims of war find a safe place
Killed Queen Order
Killed the Queen of Winds
Launched by a lightbulb
Defeat 3 Owls
100
Defeat an Owl
Defeat 3 Spinnies
Reflect 10 attacks
Charged 100 bolts
20
Did 30 dashes
10 with charged sword
7 Stompies
4 things 1 bolt
Hit 5 with a charged sword
50
3 Stompies
Charged 50 bolts
Charged 40 bolts
7
25
Charged 30 bolts
5
3
40
Defeat a Spinny
Reflect 3 attacks
Reflect an attack
Defeat 15 bats
Charge a lightbulb
15
Charged 20 bolts
30
Did 20 dashes
Defeat 7 bats
Charged 10 bolts
Defeat a stompy
Hit with a charged sword
Did 10 dashes
Spin your sword for a while
Defeat 3 bats
Charged 5 bolts
Defeat a bat
Hit 3 things with lightning
Chain 2 things with 1 bolt
3 things with 1 bolt
Did 5 dashes
10
Jump 5 times
Did a dash
Charged 2 bolts
Killed Queen Chaos
Defeated the boss of the Ruins
Defeated the Troll
Killed the Sun's King
Killed the Moon's Queen
Killed two Overseers at once!
Killed the King of Hearts
Killed the Dream King
Killed the final boss
Reflect 20 attacks
15 Stompies
Defeat 7 Spinnies
Kicked a bard 3 times
Kicked a bard 10 times
Reflect 30 attacks!