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