Here is the full list of all 49 Forge Quest achievements.
You have been defeated by a trap.
You managed to defeat a boss while at or below 1% health.
Bring a friend back from the brink of death by reviving them.
You have been defeated by a boss mob.
Solve 25 puzzles.
You have completed the game on Intermediate difficulty.
Succesfully block 100 attacks using a shield.
Receive a healing potion from an owl.
You have completed the game on Normal difficulty.
You have defeated the boss of the Fire dungeon.
Defeat a boss without using a weapon.
You have defeated the boss of the Primal dungeon.
Defeat a boss without using any skills.
Gather 500 resource gems.
Take an item to its maximum potential via combining.
Equip a pet for the first time.
You have defeated the boss of the Ice dungeon.
Defeat 50 enemies using an ability.
You have defeated the boss of the Earth dungeon.
You have unlocked a subclass.
Defeat 100 enemies using a ranged weapon.
Place a rune into a socket.
You have joined a friend's game.
Host a game and have other players join you.
Use a potion while at 10% health or less.
Somehow you have managed to best your rival in battle, granting you passage into the Earth dungeon.
You have survived the bureaucracy and lived so that you can fight monsters.
You have now left the safe confines of the city and are likely to be eaten by a grue.
You have completed the game on Hard difficulty.
You have completed the game on Expert difficulty.
You have completed the game on Master difficulty.
You have completed the game on Normal difficulty in hardcore mode.
You have completed the game on Intermediate difficulty in hardcore mode.
You have completed the game on Hard difficulty in hardcore mode.
You have completed the game on Expert difficulty in hardcore mode.
You have completed the game on Master difficulty in hardcore mode.
Be in a game with three other players.
You've tossed the wildlife 100 times.
You have spoken with the hobo 10 times.
Open 50 locked doors using a lockpick.
Gather 5000 resource gems.
Defeat 100 ninja chickens in battle.
Defeat an enemy at least five levels higher than you.
Have a hardcore character over level 10 die.
Heal a friend who is at or below 10% health.
Add or upgrade 100 item sockets.
Master everything there is to know about being a warrior.
Master everything there is to know about being a mage.
Master everything there is to know about being a rogue.