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