Here is the full list of all 58 Paladins achievements. It takes around 200 hours to unlock all of the achievements on Windows.
6 Champions at Mastery 5.
400 Double Kills.
5 Champions at Mastery 5.
4 Champions at Mastery 5.
Play over 300 matches
Survive more than 50 battles with less than 10% health.
Heal over 100,000 health in a match
Reach level 30 during the Paladins Beta.
200 Double Kills.
3 Champions at Mastery 5.
Play 100 matches while in a party.
1 Champion at Mastery 5.
2 Champions at Mastery 5.
Earn over 500,000 Gold over your play history
100 Double Kills
Play 25 hours with a player from your friends list in your party.
Kill an enemy player from over 300 units away.
Deal damage to every enemy champion in a match before any of them damage you.
50 Double Kills.
Play 50 matches while in a party.
Unlock Ranked
Shield over 200,000 damage in a match
Die to an environmental hazard.
Play 10 hours with a player from your friends list in your party.
Spend over 100,000 Credits in the item store over all your matches
Play 5 hours with a player from your friends list in your party.
Play 20 matches while in a party.
Kill more than 20 enemy champions in a single match.
Kill a player with an environmental hazard.
Land 5 headshots in a row without missing.
Get a killing blow after the round has ended.
Deal more than 100,000 damage during a match.
Play 10 matches while in a party.
10 Double Kills.
Kill an enemy player who is on a 15 killstreak or higher.
Unlock 100 Cards.
Kill an enemy champion after they had already killed you.
Kill an enemy player while you are at or below 50 Health.
Reach a 20 kill streak in a match
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.
Build your own custom loadout
Complete the Paladins Tutorial.
7 Champions at Mastery 5.
8 Champions at Mastery 5.
9 Champions at Mastery 5.
10 Champions at Mastery 5.
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.
Be the only player alive in a match.
Get a daily reward 7 days in a row
Earn over 1,000,000 Gold over your play history
Reach Master in Ranked
Have a Paladins account over 1 year old
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