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