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