Here is the full list of all 25 Diablo IV achievements.
Kill 50 enemies while Berserking as a Barbarian.
Kill 50 enemies in Werebear form and 50 enemies in Werewolf form as a Druid.
Summon 100 Skeleton Mages or Warriors as a Necromancer.
Reach Level 50 with a Hardcore character.
Get 5 PvP kills.
Kill 50 enemies in melee range and 50 enemies out of melee range as a Rogue.
Reach Level 100 with any character.
Kill the most challenging Echo of Lilith.
Upgrade your Healing Potion to max tier.
Collect 1000 Aberrant Cinder in Helltide zones.
Imprint 10 items at the Occultist with an Aspect from the Codex of Power.
Complete a Sacred and Ancestral Nightmare Dungeon.
Acquire 10 Caches of Chaos from the Tree of Whispers.
Upgrade a piece of Armor, Jewelry, and a Weapon.
Craft any Elixir and any Incense.
Explore all of Estuar.
Complete the campaign.
Kill any World Boss.
Reach Level 50 with any character.
Kill 666 Snakes or Spiders.
Kill 666 Demons, Fallen, or Goatmen.
Kill 666 Drowned, Vampires, or Werewolves.
Kill 666 Ghosts, Skeletons, or Zombies.
Kill 666 Bandits, Cultists, or Knights.
Kill 100 enemies with Fire, Frost, or Lightning damage as a Sorcerer.