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