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