About the game (from Wikipedia) :

Years after the end of the original Torchlight, The Alchemist (playable character in the first game) gets corrupted by the Ember Blight coming from the Heart of Ordrak, the evil being who had been the source of the corruption under the town of Torchlight, and then destroys the town. The player character takes on a quest to stop this villain, who is using Ordrak’s power to disturb the balance between the world’s six elements. As the game progresses, the player treks across large geographical areas, corresponding to three “acts” of the story and an epilogue. Act I is set in the mountainous Estherian Steppes, and Act II takes the player to a desert known as the Mana Wastes.

***Please note this walkthrough was not uploaded by GamingBolt.com.

Special thanks to Youtube user DanBamPow for uploading this walkthrough.