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