Just tested Torchlight II on Linux Lite 2.8 64bit. Ran fine.

Specs of the laptop I use Linux Lite on:

CPU = 2.7GHz dual core AMD
RAM = 4GB
Graphics = ATI Radeon HD 7520 (512MB)
OS = Linux Lite 2.8 64bit

I'd already been playing Torchlight II on Linux Mint 17.3 64bit.

Specs of the laptop I use Linux Mint on:

CPU = 2.4GHz quad core (i5)
RAM = 4GB
Graphics = Nvidia NVS 3100M
OS = Linux Mint 17.3 64bit

Runs fairly well on a shuttle DS57U7 with i7-5500U, Intel HD Graphics 5500, at 1920x1200. On Arch Linux.

Mind you I set the shadows to lighting only and particle detail to low because I think I got a wee tiny bit of a framerate drop in a couple big fights.