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