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