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