Have enemies chasing other enemies chasing you

Reach Rank 2 with any Warframe.

In multiplayer, be the only player on your team that isn't dead or downed.

Participated in "Lost Butterfly."

Create your first monster.

Completed the flight tutorial.

Defeat the enemy using skull attacks only

Go to the track and use a rewind

Create your first custom rider

Complete Act 5

Defeat 'Giant Spitter'

Stopped Abigail and saved Rex and Joy