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