Quit the game and then start it again.

Click on door 430 five times.

No seriously, we disabled it.

Fight through the Halperin Hotel to make contact with the authorities.

Reach Villedor.

Survive a plane crash, get bitten, and create your first Zombie-Free Zone.

Found a hole in the ground. Wow!

Built a Science Machine.

Win a Gambit match.

Enter the Dreaming City.

Collect 10 Forsaken Exotic weapons or armor.

Encounter an Agent of the Nine somewhere in the system.

Complete 30 challenges.