Here is the full list of all 48 Spider: Rite of the Shrouded Moon achievements.
Play the game under all 4 conditions.
Investigate the Captain's Quarters.
Tackle a hornet while jumping from one web to another.
Collect a SwallowTail Butterfly.
Eat 33 fireflies.
Collect a Coleophora Moth.
Discover 5 ways to die.
Discover a secret in the Study.
Spin 64 4-sided webs.
Attain rank of Knight for the first time.
Build a web while maintaining a 5x web multiplier.
Tackle all 5 gnats in a cluster in one jump.
Complete a web with 6+ sides without touching the ground.
Climb to the roof of Mansion South.
Create a six-sided web.
Eat two insects with one tackle.
Trap all bugs, eat none.
Collect an Atlas Moth.
Collect a Death's Head Moth.
Collect a Luna Moth.
Earn Scholar or better rank in 30 levels.
Tackle a hornet after eating 10 bugs in a combo.
Eat an insect exactly at midnight.
Swat 50 houseflies.
Secret Achievement
Juggle a cricket or grasshopper three times.
Attain rank of Knight in 30 levels.
Earn 50,000 points in less than 15 seconds.
Earn 32,500 points consuming only marshflies.
Max out both of your multipliers.
Trap 3 clusterflies in a 9-sided web.
Tackle an insect just before dying of hunger.
Trap a snakefly in a 7-sided web.
Find something hidden in the Vault.
Witness an event in the Laboratory.
Build an 8-sided web that isn't strong.
Finish an incomplete secret society symbol.
Tackle a dragonfly into a hornet.
Trap 10 insects in a 10-sided web.
Complete a level in under thirty seconds.
Enter a code that is valid but expired.
Eat 3 angry hornets without taking any damage.