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