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