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