No missable achievements (plus 42 unknown)
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Eat two insects with one tackle.
Create a six-sided web.
Climb to the roof of Mansion South.
Attain rank of Knight for the first time.
Eat 33 fireflies.
Discover 5 ways to die.
Spin 64 4-sided webs.
Discover a secret in the Study.
Find something hidden in the Vault.
Play the game under all 4 conditions.
Tackle an insect just before dying of hunger.
Tackle a hornet while jumping from one web to another.
Complete a web with 6+ sides without touching the ground.
Eat 3 angry hornets without taking any damage.
Eat an insect exactly at midnight.
Tackle all 5 gnats in a cluster in one jump.
Juggle a cricket or grasshopper three times.
Build a web while maintaining a 5x web multiplier.
Investigate the Captain's Quarters.
Witness an event in the Laboratory.
Collect an Atlas Moth.
Collect a SwallowTail Butterfly.
Collect a Coleophora Moth.
Tackle a dragonfly into a hornet.
Trap a snakefly in a 7-sided web.
Collect a Luna Moth.
Swat 50 houseflies.
Build an 8-sided web that isn't strong.
Max out both of your multipliers.
Collect a Death's Head Moth.
Trap all bugs, eat none.
Finish an incomplete secret society symbol.
Earn 50,000 points in less than 15 seconds.
Earn Scholar or better rank in 30 levels.
Enter a code that is valid but expired.
Tackle a hornet after eating 10 bugs in a combo.
Attain rank of Knight in 30 levels.
Trap 10 insects in a 10-sided web.
Earn 32,500 points consuming only marshflies.
Complete a level in under thirty seconds.
Trap 3 clusterflies in a 9-sided web.