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