Here is the full list of all 44 Torchlight II trophies - there are 34 bronze, 6 silver, 3 gold and 1 platinum.
Obtain All The Trophies
Find a legendary item
Reach level 100
Wear a completed armor set
Have 1,000,000 gold
Begin a new game plus
Use a map
Defeat the Nether King
Defeat the Nether King in hardcore mode
Defeat the Dark Alchemist
Defeat Verona
Defeat Aleera
Defeat Marishka
Assemble TrillBot
Do 10,000 damage with a single attack
Defeat Killbot
Defeat Vyrax
Defeat Thiss
Defeat Cacklespit
Defeat Bloatfang
Defeat the Grizzled Alpha
Defeat the Wraith Lord
Defeat Boletus Rex
Defeat the Siege Guardian
Defeat Ezrek Khan
Defeat Aruk
Defeat the King in Masks
Die with a hardcore character
Defeat the Artificer
Defeat the Manticore's Mate
Defeat the Manticore
Fish using dynamite
Defeat Grand Regent Eldrayn
Defeat King Pogg
Defeat Kidrik the Mauler
Defeat Chillhoof
Defeat the Winter Widow
Defeat General Grell
Find a secret room
Defeat One-Eyed Willy
Defeat Mordrox
Defeat the Fallen Guardian
Send your pet to town
Start a hardcore character