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