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