Here is the full list of all 80 Idle Wizard achievements.
Unlock Heretic
Complete all Challenges
Unlock Shaman
Total amount of Exiles 100
Unlock Archon
Unlock Abolisher
Craft 100 items
Unlock Ley Keeper
Reach Legacy level 25
Unlock weapons
Unlock Ironsoul
Reach Expedition level 100
Unlock Alchemist
Unlock enchantment
Unlock Hungerer
Unlock Simulacrum
Unlock Anima Construct
Unlock Archivist
Unlock Risen Giant
Unlock Voidterror
Unlock Ebonsand Behemoth
Unlock Umbramancer
Unlock Shadow Stalker
Unlock Ent
Unlock Chronomancer
Reach Legacy level 10
Unlock Exorcist
Unlock Arcanaworg
Unlock Geode
Unlock Interrogator
Unlock Pit Lord
Unlock Voidmancer
Unlock craft
Unlock Voidfiend
Unlock Devourer
Complete first challenge
Unlock Trials
Unlock Golem
Unlock Prodigy
Unlock Daemon
Unlock Arcanist
Unlock Spellhound
Unlock Homunculus
Unlock attributes
Unlock Necromancer
Unlock Demonologist
Do first Exile
Total played time 1 day
Unlock Druid
Unlock Zombie
Reach Apprentice level 5
Unlock Pixie
Buy first upgrade
Unlock Oni
Unlock Temporalist
Unlock Desolator
Reach Legacy level 50
Unlock Herald of Rot
Unlock Living Sin
Unlock Mechanos Apexis
Unlock Voidlight Amalgam
Unlock Nix-Instability
Unlock Greater Chimaera
Do first Change Realm
Reach Animatealia level 100
Reach Altermutus level 100
Reach Ardourium level 100
Reach Veritallios level 100
Reach Procreogenus level 100
Reach Tempoaeverum level 100
Reach Chaos level 100
Reach Cerebros level 100
Reach Legacy level 75
Reach Legacy level 100
Unlock Pantheon
Unlock minor Gods
Unlock Void Memetics
Unlock Catalyst Memetics
Unlock Mana source Memetics
Unlock Ascension Forms