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