Here is the full list of all 80 Nosgoth achievements.
Kill a vampire that is executing one of your teammates
Get at least 10 Kills in a single match
Kill 2 enemies using a single Reaver Choking Haze ability
Knock a pounced Reaver off your teammate
Kill 100 enemies as an Alchemist
Kill 100 enemies as a Deceiver
Kill 100 enemies as a Hunter
Kill 100 enemies as a Prophet
Kill 100 enemies as a Reaver
Kill 100 enemies as a Scout
Kill 100 enemies as the Sentinel
Kill 100 enemies as a Tyrant
Kill 1000 enemies
Get a Triple Kill
Get a Quad Kill
Earn 100 Assists
Win 100 matches
Kill 50 humans from behind with the Deceiver's Backstab ability
Get 20 Kills while dead
Kill an enemy with the Scout's Mark Target ability
Kill 50 Vampires using the Hunter's Explosive Shot ability
Make a human fall to their death with the Wing Flap ability
Use 100 Supply Stations
Kill 50 enemies with the Reaver's Pounce, Savage Pounce, or Leap Attack abilities
Dodge 500 attacks with the Reaver Evasion ability
Absorb 50,000 damage with the Tyrant's Ignore Pain ability
Using Alchemist Healing Mist, heal your teammates for 50,000 health
Steal 10,000 Health from enemies with the Prophet's Life Leech or Draining Curse abilities
Kill 50 enemies with fully charged melee attacks
Execute 250 humans
Heal teammates for 50,000 health using the Prophet's Sacrifice ability
Light 300 Vampires on fire with the Flamethrower or Fire Wall abilities
Kill an airborne enemy with an Alchemist cannon
Blind 50 enemies with the Alchemist's Sunlight Vial ability
Kill an enemy you can't see with an Alchemist cannon
Disable 25 vampires with the Hunter Bola or Poison Bola abilities
Kill a human who is using a Supply Station
Kill 10 Camouflaged Scouts
While your Deceiver Dominate Mind ability is active on an enemy, force them to die from their own area-of-effect damage
Kill a human with the Deceiver's Backstab ability while Disguise is active
Kill 25 humans as a Deceiver while your Illusions are active
Disease four different humans with a single Deceiver Infect strike
Kill 10 Vampires with Melee
Kill a Sentinel who has Kidnapped a teammate
Use the Hunter's Bola ability to disable 10 flying Sentinels or pouncing Reavers
Kill a wall climbing vampire with the Hunter's Whip ability
Kill two vampires with a single Hunter Grenade or Sticky Grenade
Kill two humans with a single Tyrant Jump Attack ability
Hex or disable 50 vampires with the Prophet's Hex Shot or Disabling Curse abilities
Kill a vampire with the Prophet's Life Leech ability while you are below 100 health
Kill two humans in the span of one Reaver Haste ability
Using the Scout's War Bow, knock a Tyrant using the Jump Attack ability out of the air
Damage four different vampires with a single Scout Volley ability
Snatch a Sentinel's Kidnap victim from the air using the Reaver's Pounce or Savage Pounce ability
Kill 50 enemies with fully drawn Scout bow shots
Kill an enemy with a Sentinel Dive Bomb that lasts 2 seconds or more
Damage four different humans with a single Sentinel Air Strike ability
Damage four different humans with a single Tyrant Charge or Marathon ability
Using the Tyrant's Throw ability, make a human fall for over 1 second and die on impact.
Stagger or knockdown 250 enemies with the Tyrant's Ground Slam or Shockwave abilities
Take 10,000 damage as a vampire without dying
Save 3 different teammates from fatal damage in a single life using the Prophet's Eldritch Guard ability
Lure enemies into triggering 3 different Scout Traps in a single life
Kill 2 humans with a single Puncture
Successfully Kidnap 50 humans
Kill 100 enemies as the Summoner
Kill 2 humans with a single Summoner Hell Strike ability
Absorb 50,000 damage with the Summoner Abyssal Barrier ability
Kill 100 enemies as the Vanguard
Stagger or knockdown 250 enemies with the Vanguard's Shield Bash or Shield Charge abilities
Kill 100 enemies as the Beastmaster
Block 500 attacks using the Vanguard's shield
Buff 100 allies with the Beastmaster’s Leyline ability
Kill two vampires with a single Nature’s Fury ability
Buff 500 allies with the Vanguard's Rousing Cry ability
Damage four different vampires with a single Beastmaster Wrath of the Firebird ability
Damage 250 vampires with all the pellets in a Beastmaster shotgun shot
Interrupt 50 vampires with the Beastmaster’s Swoop ability while they’re attacking or casting an ability