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