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