Here is the full list of all 58 Paladins achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Be the only player alive in a match.
Play 100 hours with a player from your friends list in your party.
Have over 30 different champions at mastery level 10 or higher
Kill an enemy player who is on a 15 killstreak or higher.
Get a daily reward 7 days in a row
400 Double Kills.
Earn over 1,000,000 Gold over your play history
Play over 300 matches
200 Double Kills.
Earn over 500,000 Gold over your play history
Play 25 hours with a player from your friends list in your party.
Kill an enemy player from over 300 units away.
Kill an enemy champion after they had already killed you.
100 Double Kills
Survive more than 50 battles with less than 10% health.
Reach level 30 during the Paladins Beta.
Play 100 matches while in a party.
10 Champions at Mastery 5.
50 Double Kills.
9 Champions at Mastery 5.
8 Champions at Mastery 5.
7 Champions at Mastery 5.
6 Champions at Mastery 5.
Kill a player with an environmental hazard.
Play 10 hours with a player from your friends list in your party.
5 Champions at Mastery 5.
Play 50 matches while in a party.
4 Champions at Mastery 5.
3 Champions at Mastery 5.
Spend over 100,000 Credits in the item store over all your matches
Heal over 100,000 health in a match
Unlock Ranked
Die to an environmental hazard.
2 Champions at Mastery 5.
1 Champion at Mastery 5.
Deal damage to every enemy champion in a match before any of them damage you.
Kill an enemy player while you are at or below 50 Health.
Complete the Paladins Tutorial.
Play 5 hours with a player from your friends list in your party.
Shield over 200,000 damage in a match
Land 5 headshots in a row without missing.
10 Double Kills.
Play 20 matches while in a party.
Deal more than 100,000 damage during a match.
Play 10 matches while in a party.
Build your own custom loadout
Kill more than 20 enemy champions in a single match.
Get a killing blow after the round has ended.
Reach a 20 kill streak in a match
Kill a player in the air who is over 100 units above the ground.
Play a match while in a party.
Win a match where the enemy team scored no points.
Unlock 100 Cards.
Have a Paladins account over 1 year old
Play 250 hours with a player from your friends list in your party.
Reach Master in Ranked
Have over 30 different champions at mastery level 15 or higher
Have over 30 different champions at mastery level 20 or higher