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