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