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