Here is the full list of all 43 Razenroth achievements.
Kill 20 mini bosses
Open 30 chests
Complete 5 quests
Open 15 chests
Kill Spectre
Kill 1000 monsters
Unlock Skeletor
Find Phoenix altar
Kill Meat Monster
Complete the game on hard difficulty level
Kill Killer Plant
Drink 50 potions
Unlock Fire elemental
Kill Ro'gnar
Buy 50 items
Kill 5 mini bosses
Complete the game on hell difficulty level
Unlock golem
Unlock Treant
Kill Flameclaw
Kill 500 monsters
Kill Shaman
Destroy 500 environment elements
Find magic apple
Kill Goblin Sapper
Kill Mud Monster
Buy 20 items
Collect 200 pieces of gold
Collect 500 pieces of gold
Unlock grandpa
Complete the game on any difficulty
Open 5 chests
Kill Wind Titan
Kill Swamp Thing
Buy 1 item
Buy all available things for the hut
Buy new thing for the hut
Collect 1000 pieces of gold
Destroy 100 environment elements
Kill Gruu
Kill 100 monsters
Destroy 50 environment elements
Kill Evil Tree