Here is the full list of all 60 Cattails: Wildwood Story achievements.
Catch a legendary prey
Defeat 10 voidling cats
Gather 50 herbs, flowers, and berries
Catch 50 prey
Complete a task
Recruit a cat
Find a Power Paw
Find a home for your new colony
Catch 200 prey
Catch 500 prey
Gather 200 herbs, flowers, and berries
Gather 500 herbs, flowers, and berries
Reach max friendship rank with any cat
Reach max friendship rank with 10 cats
Rank up a buddy to level 10
Purchase a Black Rose
Begin dating any cat
Get married
Have a litter of kittens
Unlock a piece of furniture
Unlock 10 pieces of furniture
Obtain 200 total den floorplan tiles
Unlock an accessory
Unlock 10 accessories
Compete in a festival game
Grow a ★★★ herb
Grow 50 ★★★ herbs
Fully upgrade your garden plot
Complete 20 tasks
Reach level 100 of the first mine
Excavate a Diamond
Excavate 20 Diamonds
Find 10 Power Paws
Find 20 Power Paws
Have 2,000 Mews on hand
Have 2,000 Mole Cash on hand
Catch a legendary bug
Unlock all Skills
Fully upgrade a Skill to rank 10
Win 5 daily battles
Win 50 daily battles
Win 100 daily battles
Defeat 100 voidling cats
Defeat 50 hostile prey
Defeat an Invasion summoned by a Wretched Talisman
Have a value of 20 or more in each colony stockpile
Unlock all Squad Barracks construction projects
Claim every possible map region for your colony
Complete year 1
Complete year 2
Complete year 3
Donate 10 Curios to the Museum
Donate all 30 Curios to the Museum
Recruit 5 cats
Recruit all cats
Reach level 100 of the second mine
Reach level 100 of the third mine
Witness a rival marriage
Purify a Dark Ruins
Complete the Main Story