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