Six new achievements also appeared. Apart from Uber Tuber, the icons are all Glyphs.
Uber Tuber
Expensive but delicious! Brought to you by Dr. Dougley and Lord Ned.
Icon: A potato with a £ sign on it.
When bought, achievement for all in server ticks and a Steam overly window loads with the Aperture Science login page. Password is unknown.
These ciphertexts are encoded using the German Enigma cipher. When plugged into →
this decoder← with the key "H E X", each one is decoded into a message that seems to be missing its first letter, perhaps referring to the glyphs associated with each achievement. The missing letters in sequence are C G H S M.
Time For
RMLYK UBBME HZZUM PRTJP GTDBS SYXVR JB
Decodes to ONGRATULATIONSYOUFOUNDTHEMESSAGE (the missing letter is "C")
Icon: The glyph associated with Killing Floor, found in RUSH.
A New Puzzle
RKVZZ MLIDX GNYSR CBH
Decodes to OODJOBPUZZLEHUNTER (the missing letter is "G")
Icon: The glyph associated with AaAaAA!!!, found in Defense Grid.
This Time
WEQHD JIIHS GXF
Decodes to EREISYOURCLUE (the missing letter is "H")
Icon: The unknown glyph sourced from Razer.
Use H E X
GBRSM VEAZD ZXGVV CPUYY C
Decodes to IXTEENANDFOURISTHEWAY (the missing letter is "S")
Icon: The unknown glyph sourced from Bit.Trip.
Not ASCII
WHAQH RKMMI KJKUV XNOAL LCKOC H
Decodes to ESSAGETRANSMISSIONCOMPLETE (the missing letter is "M")
Icon: The glyph associated with Audiosurf, found in Super Meat Boy.
The translated message:
Congratulations you found the message
Good job puzzle hunter
Here is your clue
Sixteen and four is the way
Message transmission complete
The missing letter for each message matches the respective glyph. (The AaAaAA!!! glyph was just swapped for G in the latest patch, with an "oops" added) This includes the much-contested M for the Mono glyph and speculative S for the dot glyph.