Here is the full list of all 82 HoloCure - there are Save the Fans! achievements.
Complete all achievements. Then go outside.
Defeat the Boss of Stage 3 (Hard)
Clear a Hard stage without taking any damage from projectiles.
Get Manager Level 4
Level a worker to their maximum level.
Have over 500 HP in 1 run.
Clear a (Hard) stage without taking any Healing Items.
Catch at least one of every kind of fish.
Collect 100,000 HoloCoins from workers at once.
Clear a stage only choosing the first option when leveling up without rerolls.
Catch a Shiny Fish
Harvest at least one of every kind of crop.
Clear a stage with no items.
Clear stage mode without having any Character Skills (Fandom off)
Clear a stage with Main Weapon at level 1 only.
Wait out the entire 15 seconds on Iofi's special without drawing anything
Don't take any damage for 5 minutes.
Defeat the Boss of Stage 4
Choose the Haste Stat Up option 10 times when leveling up.
Huh?
Get 50 combos in the fishing minigame.
Cook a dish.
Retire a Worker.
Use the Golden Hammer
Harvest a plant.
Annoy another member.
Get 10 combos in the fishing minigame.
Steal a fish from another member.
Go to Holo House
Complete your first game.
Defeat Fubuzilla.
Defeat the Boss of Stage 1
Defeat the Boss of Stage 2
Defeat the Boss of Stage 3
Defeat the Boss of Stage 1 (Hard)
Defeat the Boss of Stage 2 (Hard)
Clear a Stage in Time Mode
Unlock all characters.
Unlock and use a character's Special.
Destroy a Yagoo statue
Use an anvil
Reach 10 minutes with Cutting Board or related weapons using certain characters.
Complete a stage using Plug-In Type Asacoco
Have 5000 coins.
Have 1,000,000 coins.
Clear any stage while using Sake.
Reach level 50 in one game.
Reach level 100 in one game.
Defeat at least 5000 targets in a stage.
Be defeated while using Halu.
Eat over 50 hamburgers in one game.
Deal over 1000 damage in one attack.
Deal over 10000 damage in one attack.
Clear a game of Stage Mode without moving at all.
Lose after 10 minutes in a game.
Clear a game of Stage Mode without using Special after unlocking it.
Complete a stage while using Super Chatto Time.
Pet Bubba as Amelia Watson
Get 4 Collab Weapons in 1 game.
Take a total of over 500 damage in one game.
Enhance a weapon once.
Defeat a Yagoo.
Defeat a Golden Yagoo.
Defeat a Silver Yagoo.
Be defeated by a Yagoo.
Open a Super Box.
Drop a super item.
Clear a stage in Hardcore Mode.
Get a weapon to +10 enhancements.
Clear with only your main weapon.
Fail enhancements 5 times in 1 run.
Fail a +1 > +2 enhancement.
Clear with Halu item level 5.
Survive to 30 minutes with Halu item level 5.
Defeat a 10 or 20-minute Boss in under 10 seconds.
Leave a boss alive for 5 minutes or more.
Level up 5 times in a row within one second.
Complete the armory.
Watch the credits to the end.
Get over 100% crit chance in a single run.
Achieve 1,000,000 score in a single run.
Watch the TV for 10 seconds.