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