Here is the full list of all 58 Paladins achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Play 100 hours with a player from your friends list in your party.
Have a Paladins account over 1 year old
9 Champions at Mastery 5.
10 Champions at Mastery 5.
Earn over 1,000,000 Gold over your play history
Earn over 500,000 Gold over your play history
400 Double Kills.
Be the only player alive in a match.
Kill an enemy player who is on a 15 killstreak or higher.
Play over 300 matches
Play 25 hours with a player from your friends list in your party.
200 Double Kills.
Heal over 100,000 health in a match
Play 100 matches while in a party.
Reach level 30 during the Paladins Beta.
Die to an environmental hazard.
8 Champions at Mastery 5.
100 Double Kills
Survive more than 50 battles with less than 10% health.
Play 10 hours with a player from your friends list in your party.
Build your own custom loadout
7 Champions at Mastery 5.
Kill an enemy player from over 300 units away.
6 Champions at Mastery 5.
Reach a 20 kill streak in a match
5 Champions at Mastery 5.
Play 50 matches while in a party.
4 Champions at Mastery 5.
3 Champions at Mastery 5.
Spend over 100,000 Credits in the item store over all your matches
Shield over 200,000 damage in a match
Play 5 hours with a player from your friends list in your party.
50 Double Kills.
Unlock Ranked
2 Champions at Mastery 5.
Land 5 headshots in a row without missing.
Unlock 100 Cards.
Kill more than 20 enemy champions in a single match.
Play 20 matches while in a party.
Kill a player with an environmental hazard.
Play 10 matches while in a party.
Get a killing blow after the round has ended.
10 Double Kills.
1 Champion at Mastery 5.
Play a match while in a party.
Deal more than 100,000 damage during a match.
Kill an enemy champion after they had already killed you.
Kill an enemy player while you are at or below 50 Health.
Deal damage to every enemy champion in a match before any of them damage you.
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.
Play 250 hours with a player from your friends list in your party.
Get a daily reward 7 days in a row
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