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