I just name this thread as "Lambda Life 3" not because I think Half-Life 3 would have It's name changed, but because the main focus of this subject is what, in some how, is "possible" to read in the mountains on the Sierra's teaser.
I have figured out another thing, something that have changed in this year of 2014, from @valvesoftware.com to @sierrastudios.com, or It always has been under @sierrastudios.com?
Maybe it would be revealed something about Half-Life at the "The Game Awards 2014", that occurs on December 5th?
I see that Activision Publishing sector (Sierra) and also Valve will be attending at the event...
Link to the The Game Awards 2014 attendees...