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