Here is the full list of all 77 Tower of Time achievements.
Win combat with health and mana of every champion under 10%
Blind 20 enemies in one combat
Get Cindros Sword
Kill 3 enemies in one fight with Headshot
Cast Fireball 5 times in one combat
Deal 10000 damage in one combat with Rain of Arrows
Cast Elemental Barrage 25 times in one combat
Use Teleport 5 times in one combat
Use Blind Rage 2 times in one combat
Place Exploding Runes 5 times in one combat
Summon Mech 4 times in one combat
Reach the ultimate attribute cap of 40 for any attribute.
Transmute gems 30 times
Apply weakness to 20 enemies in one combat.
Finish battle with full hp of whole party
Use Gravity Well 4 times in one combat
Equip all Relics on one character
Withdraw from battle 100 times.
Use Dash skill 10 times in one combat
Win battle with a caged hero
Win a fight on level 4 or higher with 2 or less champions
Increase a single skill to a maximum.
Learn all 6 skills on a single hero.
Kill 5 enemies in one combat with Blades of Justice
Unlock Mystic Whisper.
Reach the 25 point attribute cap for any attribute.
Find all Sleath notes.
Unlock Blademaster Boron.
Resolve the conflicts between the Water and Earth Servants.
Apply 10 enchantments
Reach level 6 with any hero.
Solve the puzzle of the clocks.
Apply 30 upgrades to items
Defeat Ancient Guard
Heal 1000 damage in one fight with Healing Totem
Craft 30 items
Unlock Runelord Rakhem.
Deal 1000 damage with Ent in one combat
Upgrade Mage Tower.
Kill 100 enemies.
Unlock Druid Aeric.
Kill death reaper
Equip all items for a hero.
Upgrade Armory.
Use Teleporter.
Win battle when whole party has less than 10 HP
Obtain a legendary item.
Win battle with just one champion
Heal hero which has less than 5 HP
Kill first enemy