Rescue Sazza from the Emerald Grove, Goblin Camp, and Moonrise Towers in one playthrough.

Ally with Voss against the Githyanki God-Queen. Good luck.

Complete a level without firing a weapon

Finish chapter "Old Town"

Kill enemy by ricocheting bullet off frying pan

Kill 2000 enemies

Kick a Gas Canister in to the face of an enemy

Successfully use Detect Thoughts to pry into someone's thoughts.

Find all of Thomas' notes in a single playthrough.

Find all of Frank's postcards in a single playthrough.

You finished the game.

Make it through the pump station.

You found the Red House.