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