Hello Little Snail!
Well the list is quite extensive, so probably I will have to edit my answer couple times.
| Boss Creature | Achievement | Obs |
| Prince Drazzak | Noblesse Oblirerated | Grade: 2 Points: 6 |
| Gaz'haragoth | Prision Break | Grade: 3 Points: 8 |
| Tremor Worm | Rumble In the Plant | Grade: 2 Points: 4 |
| Glooth Bomb | Robo Chop | Grade: 2 Points: 4 |
| Minotaur Wallbreaker | Plant vs. Minos | Grade: 2 Points: 4 |
| Groam | Eye of the Deep | Grade: 1 Points: 1 |
| Fazzrah | Zzztikk Zzztanding! | Grade: 1 Points: 1 |
| Esmeralda | Twisted Mutation | Grade: 1 Points: 1 |
| Gorgo | The Serpent's Bride | Grade: 1 Points: 2 |
| Kerberos | The Gates of Hell | Grade: 1 Points: 2 |
| Leviathan | The Drowned Sea God | Grade: 1 Points: 2 |
| Tromphonyte | Stepped on a Big Toe | Grade: 1 Points: 1 |
| Ribstride | Spareribs for Dinner | Grade: 1 Points: 1 |
| Sulphur Scuttler | Something Smells | Grade: 1 Points: 1 |
| Teneshpar | Slayer of Teneshpar | Grade: 1 Points: 2 |
| Phrodomo | Slayer of Phrodomo | Grade: 1 Points: 2 |
| Irahsae | Slayer of Irahsae | Grade: 1 Points: 2 |
| Chikhaton | Slayer of Chikhaton | Grade: 1 Points: 2 |
| Anmothra | Slayer of Anmothra | Grade: 1 Points: 2 |
| Ancient Spawn of Morgathla | Scourge of Scarabs | Grade: 1 Points: 3 |
| Flameborn | Scorched Flames | Grade: 1 Points: 1 |
| Deathbine | Rootless Behaviour | Grade: 1 Points: 1 |
| Thaian | Prospectre | Grade: 1 Points: 1 |
| The Many | One Less | Grade: 1 Points: 2 |
| Hide | No More Hiding | Grade: 1 Points: 1 |
| Mamma Longlegs | Nestling | Grade: 1 Points: 1 |
| Grand Master Oberon | Millennial Falcon | Grade: 1 Points: 3 |
| The Blootusk | Meat Skewer | Grade: 1 Points: 1 |
| The Flaming Orchid | Lost Palace Raider | Grade: 1 Points: 2 |
| Drume and Fugue | Lionheart | Grade: 1 Points: 3 |
| The Scourge of Oblivion | Library Liberator | Grade: 1 Points: 3 |
| Bretzecutioner | King of the Ring | Grade: 1 Points: 2 |
| Bruise Payne | Kapow! | Grade: 1 Points: 1 |
| Stonecracker | Just Cracked Me Up! | Grade: 1 Points: 2 |
| King Zelos | Inquisition's Hand | Grade: 1 Points: 3 |
| Hemming | Howly Silence | Grade: 1 Points: 1 |
| The Noxious Spawn | Hissing Downfall | Grade: 1 Points: 2 |
| The Count of The Core | His Days are Counted | Grade: 1 Points: 1 |
| Groam | Eye of the Deeo | Grade: 1 Points: 1 |
| Paiz the Pauperizer | Enter zze Draken! | Grade: 1 Points: 2 |
| The Duke of The Depths | Duked it Out | Grade: 1 Points: 1 |
| Tormentor | Dream's Over | Grade: 1 Points: 1 |
| The Nightmare Beast | Dream Catcher | Grade: 1 Points: 3 |
| The Baron from Below, Duke of the Depths and The Count Of The Core | Death in the Depths | Grade: 1 Points: 2 |
| Fleshcrawler | Crawling Death | Grade: 1 Points: 1 |
| The Baron from Below | Buried the Baron | Grade: 1 Points: 1 |
| Shardhead | Breaking the Ice | Grade: 1 Points: 1 |
| The Snapper | Blood-Red Shapper | Grade: 1 Points: 1 |
| Bibby Bloodbath | Bibby's Bloodbath | Grade: 1 Points: 1 |
| The Pale Worm | Beyonder | Grade: 1 Points: 3 |
| Ethershreck | Beautiful Agony | Grade: 1 Points: 2 |
| Thul | Back into the Abyss | Grade: 1 Points: 1 |
| Zanakeph | Back from the Dead | Grade: 1 Points: 2 |
| The Bloodweb | Arachnoise | Grade: 1 Points: 1 |
| Scarlett Etzel | A Study in Scarlett | Grade: 1 Points: 3 |
| Gaffir | Avid Spectral Reader | Grade: 1 Points: 1 |
Achievements extras involveds with Bosses:
Pwned a Lot of Fur: After kill (Before Update 9.5) all bosses from Paw and Fur Society.
Pwned All Fur: After kill all bosses from Paw and Fur Society.
