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