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