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