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