Here is the full list of all 50 THE FINALS achievements.
Win 150 rounds with a Heavy Build
Eliminate an opponent while you are riding a Zipline, 10 times
Win 150 rounds with a Medium Build
Eliminate an opponent while you are on fire, 5 times in a single round
Eliminate an opponent with a headshot while you are sliding
Hit opponents with 3 different carriables within 15 seconds
Eliminate an opponent with a flowerpot
Eliminate an opponent with a cash box
Get 150 eliminations with Gadgets
Eliminate 25 opponents with fire
Eliminate an opponent by bouncing a grenade on a Jump Pad
Start a cashout within 15 seconds after opening a vault
Bounce a meteor off a Jump Pad during the Meteor Showers event
Get 150 eliminations with Melee Weapons
Eliminate 3 opponents with 3 different items or carriables within 10 seconds
Eliminate 3 opponents with a Melee Weapon within 10 seconds
Eliminate 25 opponents with gas
Throw a cash box into a cashout station from 20 meters away
Eliminate an opponent while you are emoting
Use an emote after eliminating an opponent
Destroy the skybridge in Seoul
Hit an opponent in the head with an explosive carriable
Play 10 rounds with a Light Build
Get eliminated by your own grenade
Get a headshot elimination with the last bullet in the magazine of your primary weapon
Start a cashout with less than 10 seconds remaining in the match
Play 10 rounds in a Party
Create a contestant
Eliminate an opponent trying to steal your cashout, 10 times
Get 300 eliminations with Ranged Weapons
Heal teammates for a total of 25,000 health
Play 10 rounds with a Heavy Build
Block a total of 25,000 damage
Finish in first place, 3 times in a row
Eliminate an opponent while they are carrying a cash box, 5 times
Revive teammates 50 times
Place an Explosive Mine on a carriable and get an elimination by throwing it at an opponent
Deal 1,000,000 damage to arenas
Insert a cash box into a cashout station
Win the final round in Tournament or Ranked Tournament
Win a round in any mode without being eliminated
Play 3 Tournament rounds
Play 10 rounds with a Medium Build
Steal a cashout with less than 10 seconds remaining in the match
Obtain a total of 100,000 cash
Play 3 rounds of Quick Cash
Revive a teammate
Complete the Tutorial
Win 150 rounds with a Light Build
Obtain a total of 50,000,000 cash