Everyone tells me that I need to go to the Codex to start the quest, but when I go there, I only have 2 quests, Vor's Prize and Howl of the Kubrow, and no sign of the MIrage quest.
How do I start the quest?
How to start the Mirage mission
warframe
Related Solutions
The game looked fun and I wanted to read some info about how to begin and such. And I think I found your awnser in this guide: http://guidescroll.com/2013/04/warframe-essential-beginners-tips/
Corpus Mission Tips
If you find your way blocked by a Laser Barrier, there is most likely one or more security cameras around that detected a hostile target.
Look for green (non hostile cameras) or red (hostile camera detecting your or your teammates) on the ceiling nearby and destroy them to shut down the barrier.
Tiplet: if you cannot find the security camera, move the whole team somewhere to try to get out of the camera’s detection. Then either make a dash for it or try to deduce where the cameras are.
Also, it is possible to bypass an active Laser Barrier by using some powers (from wiki: Excalibur‘s “Slash Dash,” Rhino‘s “Rhino Charge,” Loki‘s “Invisibility,” and Trinity‘s “Link“) or sometimes by sliding (though not very reliable for the beginner)
This is how it looks when it has not detected you:
When it has detected you it will glow red and follow your movement.
There could be a few ways to fix this.
First, launching Steam, go to Library and right click Warframe, selecting Properties. Here, go to Local Files and select "Verify Integrity of Game Cache..." If there are no files replaced, do the same thing, but select "Browse Local Files" instead of Verify. Here, delete the "Cache.Windows" and "Tools" folders, then Verify again. This will force Steam to reacquire the files.
Should those attempts show no result, try launching the game. In the launcher, click the gear(Settings) in the top right corner. Here, there are the options to Verify and Defrag your download cache. Give these a try. Should this fail as well, contact Warframe support at: https://digitalextremes.zendesk.com/hc/en-us/requests
Best Answer
Quest is called "Hidden Message", not "Secret Message". But yeah, buy the blueprint from the market to start the riddles. From there you'll get messages in your inbox that you'll have to figure out the location of. You must finish building and claim each part before you get given the next clue in your inbox.