Here is the full list of all 77 Tower of Time achievements.
Craft 30 items
Apply weakness to 20 enemies in one combat.
Cast Fireball 5 times in one combat
Summon Mech 4 times in one combat
Cast Elemental Barrage 25 times in one combat
Increase a single skill to a maximum.
Learn all 6 skills on a single hero.
Equip all Relics on one character
Reach the 25 point attribute cap for any attribute.
Unlock Mystic Whisper.
Find all Sleath notes.
Place Exploding Runes 5 times in one combat
Resolve the conflicts between the Water and Earth Servants.
Transmute gems 30 times
Unlock Blademaster Boron.
Win a fight on level 4 or higher with 2 or less champions
Apply 10 enchantments
Reach level 6 with any hero.
Solve the puzzle of the clocks.
Apply 30 upgrades to items
Defeat Ancient Guard
Unlock Runelord Rakhem.
Heal 1000 damage in one fight with Healing Totem
Finish battle with full hp of whole party
Deal 1000 damage with Ent in one combat
Equip all items for a hero.
Get Cindros Sword
Upgrade Mage Tower.
Unlock Druid Aeric.
Win battle with just one champion
Kill death reaper
Kill 100 enemies.
Upgrade Armory.
Use Teleporter.
Heal hero which has less than 5 HP
Obtain a legendary item.
Kill first enemy
Reach the ultimate attribute cap of 40 for any attribute.
Win battle when whole party has less than 10 HP
Withdraw from battle 100 times.
Use Dash skill 10 times in one combat
Use Blind Rage 2 times in one combat
Use Teleport 5 times in one combat
Use Gravity Well 4 times in one combat
Blind 20 enemies in one combat
Kill 3 enemies in one fight with Headshot
Deal 10000 damage in one combat with Rain of Arrows
Kill 5 enemies in one combat with Blades of Justice
Win battle with a caged hero
Win combat with health and mana of every champion under 10%