Here is the full list of all 63 Bravium achievements.
Kill a horde of trogs
Collect 3000 gold from a single level
Destroy green towers
Destroy a skull tower
Destroy any towers
Collect arrows from the dead archers' bodies
Kill units with magic
Kill Explosive Jellies
Kill Mosquitoes
Take a secret elixir from shamans
Kill armoured units
Help peasants to deal with wolves. Take the good sword as reward
Kill units with shaman magic
Kill enemies with sword
Kill enemies with a wand equipped
Complete a level with a crossbow
Destroy water towers
Destroy laser towers
Destroy cave towers
Equip weapons from the runes combinations
Defeat cave archers
Defeat cave bats
Kill enemies with fire
Defeat cave medusas
Defeat cave trogs
Defeat cave warriors
Defeat cave wolves
Collect flying hearts
Destroy ice towers
Kill ice archers with projectiles
Kill furry bats with familiar
Kill snowball jaws
Kill frozen mosquitoes with a shield equipped
Defeat snow shamans with a two-handed weapon
Shout at snow giants and kill them
Kill snow trogs by the Axe
Fight snow warriors with a sword
Kill bone units by Barbarian with Ice damage
Kill bone units by Mage with Lightning damage
Complete hard difficulty challenges on 3 stars on Bone World
Complete Raid Lvl 3000
Kill enemies affected by death rune
Kill enemies with poison jelly explosion
Kill enemies affected by stolen soul
Destroy glass towers with a hammer
Kill mosquitoes with range weapons when blinded
Kill white shamans by poison
Catch the ghosts
Kill enemies under the tower's sight
Kill enemies affected by the War Cry
Use Totems
Find the sorceress
Find a trinket
Complete level 20
Complete level 40
Complete level 60
Complete level 80
Complete all forest levels on hard difficulty
Complete all cave levels on hard difficulty
Complete all snow levels on hard difficulty
Complete all bone levels on hard difficulty
Kill the Worm
Complete the secret level