What Warframe quests are there?

So, the Quests page on the Codex screen has 4 boxes. The first two are Vor's Prize, which is the tutorial quest, and Howl of the Kubrow, which is the second quest.

Now I know there's a third quest, and that's for Mirage, the newest warframe, but since there are 4 boxes, does this mean there's a 4th secret mission?

What quests are available to me, and how do I start them?

2 Answers

There are 17 Warframe quests so far.

The list of quests:

• Vor's Prize
• Once Awake
• Stolen Dreams
• Howl of the Kubrow
• The Archwing
• The Limbo Theorem
• Hidden Messages
• Natah
• A Man of Few Words
• Patient Zero
• The New Strange
• The Second Dream
• Sands of Inaros
• The Jordas Precept
• The War Within
• The Glast Gambit
• The Silver Grove

1. Vor's Prize (tutorial quest)
2. Howl of the Kubrow (Get your own fur ball quest)
3. Hidden Messages (Mirage Quest)
4. Unavailable Broken/Bugged quest (source devstream 33 below)