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