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