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