Here is the full list of all 58 Paladins achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Play 250 hours with a player from your friends list in your party.
Reach Master in Ranked
Play 100 hours with a player from your friends list in your party.
Have over 30 different champions at mastery level 15 or higher
Have over 30 different champions at mastery level 20 or higher
Earn over 1,000,000 Gold over your play history
Earn over 500,000 Gold over your play history
Have a Paladins account over 1 year old
Play over 300 matches
Have over 30 different champions at mastery level 10 or higher
Build your own custom loadout
Get a daily reward 7 days in a row
Spend over 100,000 Credits in the item store over all your matches
Heal over 100,000 health in a match
Reach a 20 kill streak in a match
Shield over 200,000 damage in a match
Unlock Ranked
Unlock 100 Cards.
Be the only player alive in a match.
Play 25 hours with a player from your friends list in your party.
400 Double Kills.
Kill a player in the air who is over 100 units above the ground.
Get a killing blow after the round has ended.
Die to an environmental hazard.
Deal more than 100,000 damage during a match.
Kill an enemy player while you are at or below 50 Health.
Kill a player with an environmental hazard.
Kill an enemy player from over 300 units away.
Kill an enemy player who is on a 15 killstreak or higher.
Play 100 matches while in a party.
Play 10 hours with a player from your friends list in your party.
Play 5 hours with a player from your friends list in your party.
Play 50 matches while in a party.
200 Double Kills.
Reach level 30 during the Paladins Beta.
100 Double Kills
10 Champions at Mastery 5.
9 Champions at Mastery 5.
50 Double Kills.
8 Champions at Mastery 5.
7 Champions at Mastery 5.
6 Champions at Mastery 5.
5 Champions at Mastery 5.
Survive more than 50 battles with less than 10% health.
Play 20 matches while in a party.
4 Champions at Mastery 5.
Play 10 matches while in a party.
3 Champions at Mastery 5.
2 Champions at Mastery 5.
Kill more than 20 enemy champions in a single match.
Land 5 headshots in a row without missing.
10 Double Kills.
Kill an enemy champion after they had already killed you.
Deal damage to every enemy champion in a match before any of them damage you.
1 Champion at Mastery 5.
Play a match while in a party.
Win a match where the enemy team scored no points.
Complete the Paladins Tutorial.