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
Charged 50 bolts
Did 30 dashes
Charged 40 bolts
7
Did 20 dashes
Defeat 3 Spinnies
Charged 30 bolts
10 with charged sword
5
40
25
Launched by a lightbulb
Did 10 dashes
3
Defeat an Owl
Did 5 dashes
Charged 20 bolts
Defeat a Spinny
15
30
Charge a lightbulb
Defeat 15 bats
3 Stompies
Hit 5 with a charged sword
3 things with 1 bolt
4 things 1 bolt
Charged 10 bolts
Hit 3 things with lightning
Chain 2 things with 1 bolt
Defeat a stompy
Defeat 7 bats
Charged 5 bolts
10
Hit with a charged sword
Defeat 3 bats
Charged 2 bolts
Defeat a bat
Jump 5 times
Did a dash
Spin your sword for a while
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
100
Reflect an attack
Reflect 3 attacks
Reflect 10 attacks
Reflect 20 attacks
7 Stompies
15 Stompies
Defeat 7 Spinnies
Defeat 3 Owls
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!