Challenge achievements are those awarded to you by completing specific challenges. Some of these are easy to get, some of these are hard, but most of them are very fun! Follow our guide to get all the achiecements

CHALLENGES

Fresh Meat (20 Points)
Complete the Butcher Challenges Achievement Listed Below:
Don't Stand in the Fire! (Butcher Achievement)
A Brief Butchering (Butcher Achievement)
Stunning Reversal (Butcher Achievement)

The Fresh Meat Achievement is a "parent" achievement composed of several little achievements. We will detail how to get each of those achievements.

Out of the Shadows (20 Points)
Complete the Belial challenge achievements listed below:
Good Eye (Belial Achievement)
Why'd it have to be Snakes (Belial Achievement)
Fist Missed (Belial Achievement)
Bad Breath (Belial Achievement)

Again, another achievement which you get by obtaining other achievements.

Azmodone (20 Points)
Complete the Azmodan challenge achievements listed below:
No Reinforcements (Azmodan Achievement)
Hot Foot (Azmodan Achievement)
Be Cool (Azmodan Achievement)
Azmodan Adds (Azmodan Achievement)

Diablolical (20 Points)
Achievement Rewards: Banner Sigil
Complete the Diablo challenge achievements listed below:
Uncaged (Diablo Boss Achievement)
There can Only be One (Diablo Boss Achievement)
Self Sufficient (Diablo Boss Achievement)

In A Hurry? (20 Points)
Achievement Rewards: Banner Sigil
Complete the speed run challenge achievements listed below:
No Time to Rest (Act I Speed Run Achievement)
Sandskimmer (Act II Speed Run Achievement)
Swift Descent (Act III Speed Run Achievement)
On the Wings of Angels (Act IV Speed Run Achievements)

This one requires you to run through the acts, never engaging in unnecessary chatter or conversation with any of the NPCs. Often you will just run ahead for the exits without bothering to kill any of the monsters. Note, you cannot leave the game from beginning of act I to the end while working on these speedrun achievements. If you do, you will not get the achievement. It is recommended you do not attempt these achievements on your first playthrough, or you will be missing out on a lot of stuff (including other achievements)

Light Entertainment (10 Points)
Kill 666 enemies with a falling chandelier

When you are in dungeons, watch for the chandeliers on the ceiling. Time it properly, cut the rope, and the chandelier falls and kills the monsters it lands on. Not only you need this for the achievement, but this is a very fun and rewarding way of killing enemies.

Among the Elite (10 Points)
Achievement Rewards: Banner Sigil x2, Banner Pattern x2 Banner Accent
Kill 200 elite (champion, rare, or unique)

These are bosses you will run across in your adventures. They have yellow or purple names. Getting this achievement unlocks more, as follows:

The Elitist (10 Points) - Kill 500 elite (champion, rare or unique) enemies.
Elitist Bubble (10 Points) - 1500 elite (champion, rare or unique) enemies.
Elitist Jerks (10 Points) - 5,000 elites.
Elitist Few (10 Points) - 20,000 elites.

Golden Packs (10 Points)
Achievement Rewards: Banner Sigil, Banner Accent
Kill 20 Treasure Goblins

Treasure goblins are tiny demons that you will come across, usually in dungeons. When you hit them, they drop gold, and if you kill them they drop more gold and potentially some cool items. If you don't kill them quickly, they create a portal and vanish. Kill 20 of these, and you will get this achievement (as well as a lot of gold and loot from killing the treasure goblin itself)

Getting this achievement unlocks the next level achievement:

Greed Over Need (10 Points) - Kill 100 Treasure Goblins

Never Seen That Before (10 Points)
Achievement Rewards: Banner Sigil
Kill one of the following unique enemies:
Red Rock
Ragus Grimlow
Bellybloat the Scarred
Firestarter
Fecklar's Ghost
Logrut the Warrior
Lorzak the Powerful
Drury Brown
Lucious the Depraved
Mange
Dreadclaw the Leaper
Captain Cage
Merrium Skullthorn
Zhelobb the Venomous
Rithlin the Widowmaker
Qurash the Reviled
Venimite
Sarella the Vile
Jezeb the Conjurer
Cudgelarm
Ebenezer Samuel
Bloodfeather
Torsar
Gart the Mad
Ashek
Beyatt (Act II: Lost Caravan)
Otzi the Cursed
Hellscream
The Archivist
Saha the Slasher
Raiha the Vicious
Blarg the Imp
Thrum, Razormouth
Mage Lord Skomara
Mage Lord Ghuyan
Mage Lord Flayden
Mage Lord Caustus
Hazzor the Viper
Yakara
Stinging Death Swarm
Sammash, Yeh
High Cultist Murdos
Shondar the Invoker, Haxxor
Axgore the Cleaver
Vicious Gray Turkey
Gugyn the Gauntlet
Dreadgrasp
Marchocyas
Direclaw the Demonflyer
Bashface the Truncheon
The Crusher
Lummock the Brute
Growlfang
Mehshak the Abomination
Gholash
Blarg the Foul
Hyrug the Malformed
Charuch the Spear
Shandra'Har
Chiltara
Severclaw
Thornback
Gormungandr
Captain Dale
Axegrave the Executioner
Belagg Pierceflesh
Riplash
Demonika the Wicked
Gorog the Bruiser
Pyres the Damned
Torchlighter
Khatun
Grimnight the Soulless
Haures
Vehan the Fierce
Slarg the Behemoth
Sao'Thall, Rhau'Kye
Kysindra the Wretched

The above unique bosses spawn each in a specific zone. Their name is in purple. But they are not guaranteed to spawn in that zone, so it might take a few runs to that area to find them. We have placed the Act number and Location of each monster next to its name, when known.We will be continously updating this guide and adding the locations of all the uniques. So bookmark this guide and come back often. Also, If you run across one of them, please leave a comment to let us know what zone you found it in.

The next phases of this achievement are:
Special Snowflakes (10 Pts) - Kill 15 of the following unique enemies
A Unique Collection (10 Pts) - Kill ALL of the following unique enemies

Keep it Rare (10 Points)
Achievement Rewards: Banner Sigil, Banner Pattern
Kill 10 rare enemies of the following types:
Savage Beast, Harvester, Imp, Enraged Phantom, Savage Fiend, Quill Demon, Scavenger, Skeleton, Skeletal Archer, Returned Archer, Arachnid Horror, Dark Berserker, Dark Cultist, Unholy Thrall, Disentombed Hulk, Hungry Corpse, Retching Cadaver, Ravenous Dead, Dune Dervish, Fallen Overseer, Fallen, Fallen Peon, Fallen Cur, Fallen Conjurer, Betrayed, Accursed, Cave Wing, Murderous Fiend, Vicious Ghoul, Lacuni Huntress, Lacuni Slasher, Dust Imp, Sand Dweller, Sand Behemoth, Ancient Walker, Reaper, Skeletal Sentry, Skeletal Raider, Bone Warrior, Spine Hewer, Skeletal Ranger, Smoldering Construct, Charged Construct, Noxious Guardian, Serpent Magus, Webspitter Spider, Brood Hatchling, Frenzied Hellion, Hulking Phasebeast, Demonic Tremor, Armored Destroyer, Herald of Pestilence, Demonic Hellflyer, Demon Trooper, Fallen Slavelord, Fallen Grunt, Fallen Soldier, Fallen Hellhound, Fallen Prophet, Blood Clan Warrior, Blood Clan Occultist, Wintersbane Huntress, Stygian Crawler, Skeletal Marauder, Skull Sword, Skull Cleaver, Soul Ripper, Succubus, Colossal Golgor, Darksky Fire Demon, Enslaved Nightmare, Mallet Lord, Subjugator, Armaddon, Morlu Legionnaire, Morlu Incinerator

These enemies are yellow named. They are same as the common enemies that you encounter, but they are a rare version of them, more powerful and with more health. Their name is generated at random. To find those, just keep farming where the monsters of the common type reside. You can redo a quest over and over if you just want to farm a certain zone.

The next steps are:
Rarin' to Go (10 Pts) - Kill 50 rare enemies of the following types
A Rare Phenomenon (10 Pts) - Kill a rare enemy of ALL the following types

The Takedown (10 Points)
Achievement Rewards: Banner Sigil, Banner Pattern
Kill 10 champions of the following types:
Horned Charger, Imp, Carrion Bat, Savage Fiend, Quill Demon, Scavenger, Returned Executioner, Skeletal Archer, Dark Berserker, Dark Hellion, Unholy Thrall, Disentombed Hulk, Hungry Corpse, Ravenous Dead, Fallen Overseer, Fallen, Fallen Peon, Fallen Cur, Fallen Conjurer, Accursed, Savage Flyer, Deathly Haunt, Grim Wraith, Vicious Ghoul, Lacuni Slasher, Rock Giant, Sand Behemoth, Sand Wasp, Reaper, Skeletal Raider, Bone Warrior, Spine Hewer, Skeletal Ranger, Chilling Construct, Shock Guardian, Noxious Guardian, Writhing Deceiver, Webspitter Spider, Brood Hatchling, Vile Swarm, Hulking Phasebeast, Demonic Tremor, Armored Destroyer, Herald of Pestilence, Demonic Hellflyer, Demon Trooper, Fallen Overlord, Fallen Slavelord, Fallen Grunt, Fallen Soldier, Fallen Mongrel, Fallen Hellhound, Blood Clan Warrior, Blood Clan Mauler, Blood Clan Impaler, Blood Clan Sorcerer, Blood Clan Occultist, Wintersbane Huntress, Stygian Crawler, Icy Quillback, Skeletal Marauder, Skull Cleaver, Dark Skeletal Bowman, Soul Ripper, Succubus, Plague Swarm, Darksky Fire Demon, Enslaved Nightmaare, Mallet Lord, Subjugator, Morlu Legionnaire, Morlu Incinerator

Again, these are more rare versions of common monsters. Their name is in blue or purple. Farm areas where you normally would find the regular version of the monster.

Completing this achievement triggers the next ones:
Not so tough now (10 Pts) - Kill 50 champions of the following types
Champion's Collection (10 Pts) - Kill a champion of ALL the following types

Sheer Lunacy (10 Points)
Achievement Rewards: Banner Sigil
Kill 100 Fallen Lunatics before they can explode

Fallen Lunatics are suicidal monsters that run towards you with a knife in their hand, stabbing themselves until they explode. You need to kill them fast to advance in this achievement. Ranged players have an advantage as they can kill the Fallen Lunatics before they approach the player and explode.

Situational Awareness (10 Points)
Kill 1,000 enemies using the environment

Chandeliers, Traps, Collapsing Walls - look for all of those to help you kill monsters in a fun way, and get you this achievement.

Punch Diablo (10 Points)
Punch Diablo

To get this one, unequip all your weapons, and unbind your right mouse button skill. Then stand next to Diablo, and right click on him to punch Diablo!

Naked Lust (10 Points)
Defeat Cydea without any items equipped on Hell difficulty or higher
Achievement Rewards: Banner Sigil

Unequip all your items before this boss fight. Win, and you get this achievement.

The Hero's New Clothes (10 Points)
Achievement Rewards: Banner Accent
Defeat all of the following enemies without any items equipped on Hell difficulty or higher:
The Butcher
Belial
Azmodan
Diablo

More bosses to defeat without weapons or armor on.

Demolition Derby (10 Points)
Get a destruction callout for breaking 50 objects

You need to chain destroy 50 breakable objects to get this achievement. Good places for this are the Royal Crypts (Ash Pots) and the Cemetery of the Forsaken (Stone Columns)

I'll be your Wingman (10 Points)
Achievement Rewards: Banner Accent
Let a follower get the killing blow on all of the following enemies:
Skeleton King
Queeen Araneae
The Butcher
Maghda
Zoltun Kulle
Belial
Cydaea
Siegebreaker Assault Beast
Ghom
Azmodan

Best way to get this, when the boss is on low health, stop using offensive abilities and let the follower do all the work.

I'm Slapped (10 Points)
Achievement Rewards: Banner Accent
Knockback 5 imps at one time

All classes have some sort of ability that does knockout. Use it on large groups of imps.

Attacking the Darkness (10 Points)
Achievement Rewards: Banner Accent
Kill 20 Shadow Vermin, Gloom Wraiths, or Shade Stalkers at once

AOE abilities are good for this one.

With Friends like These (10 Points)
Kill 30 enemies from the death explosion of a single grotesque, Harvester, Horror, Abomination, Bile Crawler, or Spine Lasher

Have these enemies explode near other groups of large enemies

Massive Blow (10 Points)
Kill 30 enemies in one attack

This is what Area of Effect abilities are for

Survivor (10 Points)
Survive Combat with low health 250 times

In this one, you have to be very low on health when combat ends. The instinct says to use health potion when you are low on health, but that decreases the chance of getting this achievement.

Savior (10 Points)
Save players from death 250 times

Deliver the last blow on a monster when another player is at 5% health or less

Pink'd (10 Points)
Kill the following enemies while wearing head, shoulder, feet, leg, hand, and torso equipment colored with Lovely Dye:
Skeleton King
Queen Araneae
The Butcher
Maghda
Zoltun Kulle
Belial
Ghom
Cydaea
Azmodan
Siegbreaker Assault Beast
Diablo

Dye all your armor pieces with Lovely Dye before fighting the above bosses.

Untouchable (10 Points)
Kill the following enemies without taking any damage in a single player game
The Butcher
Belial
Azmodan
Diablo

Best way is to let your follower do most of the work while you stay in a safe distance, avoiding aggroing the enemy

Got Out (10 Points)
Achievement Rewards: Banner Accent
Escape the Crumbling Vault before it collapses

The Crumbling Vault is in the Stinging Winds desert in Act II.

A Second to Spare (10 Points)
Achievement Rewards: Banner Sigil
Escape the Crumbling Vault in Under 90 seconds

Bashanishu (10 Points)
Achievement Rewards: Banner Accent
Hurt Bashiok using Rakanishu's Blade

You get the Rakanishu Blade by completing the Shrine of Rakanishu event in northern Dahlgur Oasis in Act II. Bashiok also wanders around that area, but is a rare spawn.