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