Here is the full list of all 35 Fall Guys: Ultimate Knockout (2020) trophies - there are 21 bronze, 8 silver, 5 gold and 1 platinum.
Acquire all other trophies
Win 5 Episodes in a row
Equip a legendary Body Colour, Pattern, Upper and Lower Costume piece
Unlock 50 cosmetic items from the store
Reach lvl 40 fame during a season
Win 20 Episodes
Qualify from 500 rounds
Clock up 1 hour total time falling
Win 7 Episodes
Equip your first legendary customization item
Get first place in a racing round 20 times
Reach lvl 25 fame during a season
Win an Episode with a custom Punchline equipped
Win an Episode as part of a party of 3 or more players
Unlock 10 cosmetic items from the store
Equip an uncommon or better Body Colour, Pattern, Upper and Lower Costume piece
Equip a rare or legendary Body Colour, Pattern, Upper and Lower Costume piece
Qualify from 100 rounds
Get first place in a racing round 5 times
Reach lvl 10 fame during a season
Qualify from a team game with a score of 1
Knock someone over
Get first place in a racing round
Perform an emote just before coming first in a race round
Reach terminal velocity
Bump into other Fall Guys 1000 times in total
Fall for at least 3 seconds before landing on your head
Equip your first cosmetic item
Qualify from a racing round despite falling over more than 10 times
Win your first Episode
Qualify after a round goes to overtime
Qualify from a round without falling over even once
Qualify from your first round
Bump into 3 people while rolling on the ground before getting up
Share a hug with a Fall Guy