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