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
Reach level 100
Wear a completed armor set
Have 1,000,000 gold
Find a legendary item
Use a map
Begin a new game plus
Defeat the Nether King
Defeat the Nether King in hardcore mode
Defeat the Dark Alchemist
Defeat Verona
Defeat Aleera
Defeat Marishka
Assemble TrillBot
Defeat Killbot
Defeat Vyrax
Defeat Thiss
Defeat Cacklespit
Defeat Bloatfang
Defeat the Wraith Lord
Defeat the Grizzled Alpha
Defeat Boletus Rex
Defeat the Siege Guardian
Defeat Ezrek Khan
Defeat the King in Masks
Defeat Aruk
Defeat the Artificer
Defeat the Manticore's Mate
Defeat the Manticore
Defeat Grand Regent Eldrayn
Do 10,000 damage with a single attack
Defeat Kidrik the Mauler
Defeat Chillhoof
Defeat King Pogg
Defeat the Winter Widow
Defeat General Grell
Defeat Mordrox
Send your pet to town
Find a secret room
Defeat One-Eyed Willy
Fish using dynamite
Defeat the Fallen Guardian
Die with a hardcore character
Start a hardcore character