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