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