Reach account level 15 and have at least 12 champions unlocked (rotation champions do not count).
Easy "Bounty Hunter" Achievement
Keep your eye on the scoreboard, as it will show the streaks that each player is on. As soon as you see someone is at a 15 streak, focus on killing them. It may be frustrating to just focus on getting this achievement, so just work on every other achievement while you're playing. In 250 hours you'll probably manage to kill someone on a 15 streak just by playing the game, so this one shouldn't be too hard.
Easy "Counter-Air Defense" Achievement
Easiest way when you got drogoz as enemy. snipe or kill him while he fly. or when the enemy is adroxus, he usually fly above when ulti, kill him during that.
Easy "Hard Carry" Achievement
The achievement description at the time of writing this reads "Kill more than 20 enemy champions in a single match," which would have you believe that you need 21+ eliminations. However, it *should* read "Kill more than 20 enemy champions in a single life" since it's actually the case that you need a 21+ killstreak. I would recommend (and achieved this with) Ruckus, since his miniguns allow you to tag many targets very quickly, giving you credit for their deaths. With his emitter shield, he is also pretty much invincible 1v1. If you haven't unlocked Ruckus or otherwise don't want to play him, Viktor also works, though his health is pretty low so you run the risk of losing your streak.
Easy "Last One Standing" Achievement
Your best bet for this achievement is to play survival mode with Torvald. When you have a full ult charge, hide away from the fight until the ring collapses to the middle. The rest of your team needs to be dead before you attempt this. Approach the safe point in the middle and ult all the remaining enemy players away. You should be able to knock them far enough into the mist that they will either die from it or be so hurt by the time they make it back that you can clean them up. Kill the last player, pop a swag emote, and your achievement should unlock when the round ends. Good luck.
Easy "Questions Later" Achievement
That is luck based, so my ideal set up for this would be, charge your ultimate with Viktor and wait for the next round, then when they are point use it and lets hope you hit all 5. Note, you don't need to kill them, just do a little damage.
Easy "Send Off" Achievement
The easiest way to earn this achievement is to play Torvald. Position yourself so that you are facing an open area of the map and send someone flying to their death in the distance. I'd say Fish Market would be the easiest map to do this on.
Easy "Sniper" Achievement
Best way to get this achievement is using Torvald ult against enemy that far away which is near the ledge. I got this achievement while playing in Fish Market siege mission when groups of enemy pushing cart at the corner and send them with Torvald ult to fly away off the map.
Various Steam Achievements
Complete the indicated task to unlock the achievement.
Achievement
How to unlock
Beta Player
Reach level 30 during the Paladins Beta
Boom Headshot
Land 5 headshots in a row without missing
Bounty Hunter
Kill an enemy player who is on a 15 killstreak or higher
Bronze Friends Forever
Play 5 hours with a player from your friends list in your party
Champion Mastery I
1 Champion at Mastery 5
Champion Mastery II
2 Champion at Mastery 5
Champion Mastery III
3 Champion at Mastery 5
Champion Mastery IV
4 Champions at Mastery 5
Champion Mastery IX
9 Champions at Mastery 5
Champion Mastery V
5 Champions at Mastery 5
Champion Mastery VI
6 Champions at Mastery 5
Champion Mastery VII
7 Champions at Mastery 5
Champion Mastery VIII
8 Champions at Mastery 5
Champion Mastery X
10 Champions at Mastery 5
Counter-Air Defense
Kill a player in the air who is over 100 units above the ground
Double Kills Bronze
10 Double Kills
Double Kills Diamond
400 Double Kills
Double Kills Gold
100 Double Kills
Double Kills Platinum
200 Double Kills
Double Kills Silver
50 Double Kills
Friends Forever Diamond
Play 250 hours with a player from your friends list in your party
Friends Forever Gold
Play 25 hours with a player from your friends list in your party
Friends Forever Platinum
Play 100 hours with a player from your friends list in your party
From The Grave
Kill an enemy champion after they had already killed you
Give 110 Percent
Get a killing blow after the round has ended
Gone Spelunking
Die to an environmental hazard
Hard Carry
Kill more than 20 enemy champions in a single match
I Like Big Numbers
Deal more than 100,000 damage during a match
Last One Standing
Be the only player alive in a match
Master Collector
Unlock 100 Cards
Not Like This
Kill an enemy player while you are at or below 50 Health
Questions Later
Deal damage to every enemy champion in a match before any of them damage you
Send Off
Kill a player with an environmental hazard
Silver Friends Forever
Play 10 hours with a player from your friends list in your party
Sniper
Kill an enemy player from over 300 units away
Survivor
Survive more than 50 battles with less than 10% health
