Here is the full list of all 58 Paladins achievements. It takes around 200 hours to unlock all of the achievements on Windows.
200 Double Kills.
400 Double Kills.
Land 5 headshots in a row without missing.
Play 100 hours with a player from your friends list in your party.
Play 250 hours with a player from your friends list in your party.
Deal damage to every enemy champion in a match before any of them damage you.
Complete the Paladins Tutorial.
Shield over 200,000 damage in a match
Heal over 100,000 health in a match
Get a daily reward 7 days in a row
Play over 300 matches
Earn over 1,000,000 Gold over your play history
Reach a 20 kill streak in a match
Reach Master in Ranked
Have over 30 different champions at mastery level 10 or higher
Have over 30 different champions at mastery level 15 or higher
Have over 30 different champions at mastery level 20 or higher
Kill an enemy player from over 300 units away.
Play 25 hours with a player from your friends list in your party.
7 Champions at Mastery 5.
8 Champions at Mastery 5.
9 Champions at Mastery 5.
10 Champions at Mastery 5.
Earn over 500,000 Gold over your play history
Reach level 30 during the Paladins Beta.
100 Double Kills
Spend over 100,000 Credits in the item store over all your matches
Build your own custom loadout
Unlock Ranked
Have a Paladins account over 1 year old
6 Champions at Mastery 5.
4 Champions at Mastery 5.
5 Champions at Mastery 5.
Play 100 matches while in a party.
Kill more than 20 enemy champions in a single match.
Die to an environmental hazard.
Get a killing blow after the round has ended.
50 Double Kills.
3 Champions at Mastery 5.
Play 10 hours with a player from your friends list in your party.
Unlock 100 Cards.
Kill a player with an environmental hazard.
Kill an enemy player who is on a 15 killstreak or higher.
Play 50 matches while in a party.
2 Champions at Mastery 5.
Play 5 hours with a player from your friends list in your party.
1 Champion at Mastery 5.
10 Double Kills.
Be the only player alive in a match.
Play 20 matches while in a party.
Kill a player in the air who is over 100 units above the ground.
Deal more than 100,000 damage during a match.
Kill an enemy player while you are at or below 50 Health.
Play 10 matches while in a party.
Kill an enemy champion after they had already killed you.
Survive more than 50 battles with less than 10% health.
Win a match where the enemy team scored no points.
Play a match while in a party.